diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a6f73b90..64fdfda13 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -76,6 +76,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [3.1.0](https://github.com/InseeFr/Pogues/releases/tag/3.1.0) - 2026-05-13
 
+### Added
+
+- In a unique choice question with modalities computed from a variable, you can now add a VTL expression for filtering modalities.
+
 ### Fixed
 
 - Questionnaire loading no longer crash when a question uses a code list (or nomenclature) that does not exist anymore. It could happen when an existing question used a previous version of a nomenclature.
diff --git a/legacy/src/constants/dictionary/codes.ts b/legacy/src/constants/dictionary/codes.ts
index 61ff920df..576a08f25 100644
--- a/legacy/src/constants/dictionary/codes.ts
+++ b/legacy/src/constants/dictionary/codes.ts
@@ -46,4 +46,8 @@ export const codesDictionary: Dictionary = {
     fr: `Modifier le filtre`,
     en: `Modify filter`,
   },
+  modalityFilter: {
+    fr: `Filtre de modalités`,
+    en: `Modality filter`,
+  },
 };
diff --git a/legacy/src/model/formToState/component-new-edit/collected-variable.jsx b/legacy/src/model/formToState/component-new-edit/collected-variable.jsx
index 9179bf5af..6b7d426a7 100644
--- a/legacy/src/model/formToState/component-new-edit/collected-variable.jsx
+++ b/legacy/src/model/formToState/component-new-edit/collected-variable.jsx
@@ -15,6 +15,7 @@ export const defaultState = {
   codeListReferenceLabel: '',
   variableReference: '',
   variableReferenceLabel: '',
+  optionFilter: '',
   choiceType: '',
   isCollected: '1',
   alternativeLabel: '',
@@ -33,6 +34,7 @@ export const defaultForm = {
   codeListReferenceLabel: '',
   variableReference: '',
   variableReferenceLabel: '',
+  optionFilter: '',
   choiceType: '',
   isCollected: '1',
   alternativeLabel: '',
@@ -58,6 +60,7 @@ export function formToState(form, codesListsStore = {}) {
     codeListReferenceLabel,
     variableReference,
     variableReferenceLabel,
+    optionFilter,
     choiceType,
     isCollected,
     alternativeLabel,
@@ -83,6 +86,7 @@ export function formToState(form, codesListsStore = {}) {
     codeListReferenceLabel,
     variableReference,
     variableReferenceLabel: resolvedVariableReferenceLabel,
+    optionFilter,
     choiceType,
   };
 }
@@ -119,6 +123,7 @@ export function storeToForm(currentStore) {
         codeListReferenceLabel,
         variableReference,
         variableReferenceLabel,
+        optionFilter,
         choiceType,
       } = currentStore[key];
       return {
@@ -137,6 +142,7 @@ export function storeToForm(currentStore) {
         codeListReferenceLabel,
         variableReference,
         variableReferenceLabel,
+        optionFilter,
         choiceType,
       };
     });
diff --git a/legacy/src/model/formToState/component-new-edit/component.jsx b/legacy/src/model/formToState/component-new-edit/component.jsx
index 007b01ff5..6b836daf7 100644
--- a/legacy/src/model/formToState/component-new-edit/component.jsx
+++ b/legacy/src/model/formToState/component-new-edit/component.jsx
@@ -58,6 +58,7 @@ export function formToState(form, transformers) {
     occurrenceDescription,
     locked,
     codeFilters = [],
+    optionFilter,
   } = form;
 
   let newName;
@@ -107,6 +108,7 @@ export function formToState(form, transformers) {
     occurrenceDescription: occurrenceDescription,
     locked: locked,
     codeFilters,
+    optionFilter,
   };
   if (res.responseFormat.type) {
     transformers.codesList.formToComponentState(
@@ -140,6 +142,7 @@ export function stateToForm(currentState, transformers, activeQuestionnaire) {
     locked,
     selectedComponent,
     codeFilters = [],
+    optionFilter,
   } = currentState;
 
   let target = '';
@@ -176,6 +179,7 @@ export function stateToForm(currentState, transformers, activeQuestionnaire) {
     occurrenceDescription: occurrenceDescription || '',
     locked: locked,
     codeFilters,
+    optionFilter,
   };
 
   if (type === QUESTION) {
diff --git a/legacy/src/model/formToState/lists/utils.js b/legacy/src/model/formToState/lists/utils.js
index fe3d5aec5..dbb91dea4 100644
--- a/legacy/src/model/formToState/lists/utils.js
+++ b/legacy/src/model/formToState/lists/utils.js
@@ -9,10 +9,10 @@ export function createListFactory(
   currentState = {},
 ) {
   if (codesListsStore && currentState.id) {
-    currentState = merge(
-      cloneDeep(defaultState),
-      codesListsStore[currentState.id],
-    );
+    currentState = merge(cloneDeep(defaultState), {
+      ...codesListsStore[currentState.id],
+      optionFilter: currentState.optionFilter,
+    });
   } else {
     currentState = cloneDeep(defaultState);
   }
diff --git a/legacy/src/model/formToState/lists/variables.js b/legacy/src/model/formToState/lists/variables.js
index ae4588dc1..9120ed3c5 100644
--- a/legacy/src/model/formToState/lists/variables.js
+++ b/legacy/src/model/formToState/lists/variables.js
@@ -5,16 +5,18 @@ export const defaultState = {
   label: '',
   name: '',
   scope: '',
+  optionFilter: '',
 };
 
 export function formToState(form) {
-  const { id, label, name, scope } = form;
+  const { id, label, name, scope, optionFilter } = form;
 
   return {
     id,
     name,
     label,
     scope,
+    optionFilter,
   };
 }
 
@@ -23,12 +25,14 @@ export function stateComponentToForm({
   name = '',
   label = '',
   scope = '',
+  optionFilter = '',
 }) {
   return {
     id,
     name,
     label,
     scope,
+    optionFilter,
   };
 }
 
diff --git a/legacy/src/model/transformations/component.jsx b/legacy/src/model/transformations/component.jsx
index 47aa02622..6ab979d0d 100644
--- a/legacy/src/model/transformations/component.jsx
+++ b/legacy/src/model/transformations/component.jsx
@@ -352,6 +352,7 @@ function remoteToState(remote, componentGroup, codesListsStore) {
     Locked: locked,
     Loop: loop,
     codeFilters: codeFilters,
+    OptionFilter: optionFilter,
     sourceVariableReferences,
   } = remote;
   const redirectionClar =
@@ -387,6 +388,7 @@ function remoteToState(remote, componentGroup, codesListsStore) {
     dynamiqueSpecified:
       flowLogic && flowLogic === FILTER ? Filtres : Redirections,
     codeFilters,
+    optionFilter,
   };
   if (genericName) {
     state.label = label;
@@ -422,6 +424,7 @@ function remoteToState(remote, componentGroup, codesListsStore) {
       scope,
       mandatory,
       sourceVariableReferences,
+      optionFilter,
     );
     state.collectedVariables =
       CollectedVariable.remoteToComponentState(responseFinal);
diff --git a/legacy/src/model/transformations/response-format-single.spec.ts b/legacy/src/model/transformations/response-format-single.spec.ts
index 22ca52ba4..267f8b785 100644
--- a/legacy/src/model/transformations/response-format-single.spec.ts
+++ b/legacy/src/model/transformations/response-format-single.spec.ts
@@ -86,10 +86,11 @@ describe('response format single', () => {
             choiceType: CHOICE_TYPE.VARIABLE,
           },
         ],
+        optionFilter: 'nice filter',
       };
       const output = remoteToState(remote);
       const expected = {
-        Variable: { id: 'my-variable-id' },
+        Variable: { id: 'my-variable-id', optionFilter: 'nice filter' },
         id: 'my-response-id',
         mandatory: true,
         choiceType: 'VARIABLE',
@@ -167,7 +168,7 @@ describe('stateToRemote', () => {
       mandatory: true,
       visHint: DATATYPE_VIS_HINT.RADIO,
       choiceType: CHOICE_TYPE.VARIABLE,
-      Variable: { id: 'my-variable-id' },
+      Variable: { id: 'my-variable-id', optionFilter: 'nice filter' },
     };
     const collectedVariables = ['my-var-id'];
     const output = stateToRemote(state, collectedVariables);
@@ -187,6 +188,7 @@ describe('stateToRemote', () => {
           mandatory: true,
         },
       ],
+      optionFilter: 'nice filter',
     };
     expect(output).toEqual(expected);
   });
diff --git a/legacy/src/model/transformations/response-format-single.ts b/legacy/src/model/transformations/response-format-single.ts
index 052fe8e2d..6c6ca6dd8 100644
--- a/legacy/src/model/transformations/response-format-single.ts
+++ b/legacy/src/model/transformations/response-format-single.ts
@@ -50,12 +50,13 @@ export type StateResponseFormatSingle = {
         | DATATYPE_VIS_HINT.CHECKBOX
         | DATATYPE_VIS_HINT.RADIO
         | DATATYPE_VIS_HINT.DROPDOWN;
-      [DEFAULT_VARIABLE_SELECTOR_PATH]: { id: string };
+      [DEFAULT_VARIABLE_SELECTOR_PATH]: { id: string; optionFilter?: string };
     }
 );
 
 export function remoteToState(remote: {
   responses: RemoteResponseFormatSingle;
+  optionFilter?: string;
 }): StateResponseFormatSingle {
   const {
     responses: [
@@ -68,6 +69,7 @@ export function remoteToState(remote: {
         id,
       },
     ],
+    optionFilter,
   } = remote;
 
   const baseState = {
@@ -94,7 +96,10 @@ export function remoteToState(remote: {
   if (choiceType === CHOICE_TYPE.VARIABLE) {
     return {
       ...baseState,
-      [DEFAULT_VARIABLE_SELECTOR_PATH]: { id: VariableReference as string },
+      [DEFAULT_VARIABLE_SELECTOR_PATH]: {
+        id: VariableReference as string,
+        optionFilter,
+      },
       visHint,
     };
   }
@@ -111,12 +116,13 @@ export function remoteToState(remote: {
 export function stateToRemote(
   state: StateResponseFormatSingle,
   collectedVariables: string[],
-): { Response: RemoteResponseFormatSingle } {
+): { Response: RemoteResponseFormatSingle; optionFilter?: string } {
   const { allowArbitraryResponse, visHint, mandatory, id, choiceType } = state;
 
   let nomenclatureId;
   let codesListId;
   let variableReferenceId;
+  let optionFilter;
 
   if (
     choiceType === CHOICE_TYPE.SUGGESTER &&
@@ -128,6 +134,7 @@ export function stateToRemote(
     DEFAULT_VARIABLE_SELECTOR_PATH in state
   ) {
     variableReferenceId = state[DEFAULT_VARIABLE_SELECTOR_PATH]?.id;
+    optionFilter = state[DEFAULT_VARIABLE_SELECTOR_PATH]?.optionFilter;
   } else if (
     choiceType === CHOICE_TYPE.CODE_LIST &&
     DEFAULT_CODES_LIST_SELECTOR_PATH in state
@@ -150,5 +157,6 @@ export function stateToRemote(
         collectedVariable: collectedVariables[0],
       }),
     ],
+    optionFilter,
   };
 }
diff --git a/legacy/src/model/transformations/response-format-table.jsx b/legacy/src/model/transformations/response-format-table.jsx
index 8655b08c8..38b6de3e6 100644
--- a/legacy/src/model/transformations/response-format-table.jsx
+++ b/legacy/src/model/transformations/response-format-table.jsx
@@ -232,7 +232,12 @@ function remoteToStateMeasure(remote) {
     state.type = SINGLE_CHOICE;
     state[SINGLE_CHOICE] = ResponseFormatSingle.remoteToState({
       responses: [
-        { Datatype, VariableReference, choiceType, CollectedVariableReference },
+        {
+          Datatype,
+          VariableReference,
+          choiceType,
+          CollectedVariableReference,
+        },
       ],
     });
   } else {
diff --git a/legacy/src/model/transformations/response-format-table.spec.jsx b/legacy/src/model/transformations/response-format-table.spec.jsx
index 9f3837cd4..5ea3cb8eb 100644
--- a/legacy/src/model/transformations/response-format-table.spec.jsx
+++ b/legacy/src/model/transformations/response-format-table.spec.jsx
@@ -1,7 +1,11 @@
 import { describe, expect, it } from 'vitest';
 
+import { CHOICE_TYPE } from '@/constants/pogues-constants';
+
 import { remoteToState, stateToRemote } from './response-format-table';
 
+const { CODE_LIST, SUGGESTER, VARIABLE } = CHOICE_TYPE;
+
 describe('remoteToState', () => {
   it('should use an offset equal to 1', () => {
     const remote = {
@@ -230,7 +234,7 @@ describe('remoteToState', () => {
             type: 'TextDatatypeType',
             MaxLength: 1,
           },
-          choiceType: 'SUGGESTER',
+          choiceType: SUGGESTER,
           CollectedVariableReference: 'mbz5jjxv',
         },
         {
@@ -242,7 +246,19 @@ describe('remoteToState', () => {
             type: 'TextDatatypeType',
             MaxLength: 1,
           },
-          choiceType: 'CODE_LIST',
+          choiceType: CODE_LIST,
+          CollectedVariableReference: 'mbz5crwv',
+        },
+        {
+          id: 'mbh8ke14',
+          VariableReference: 'kdyg5y7',
+          Datatype: {
+            typeName: 'TEXT',
+            visualizationHint: 'RADIO',
+            type: 'TextDatatypeType',
+            MaxLength: 1,
+          },
+          choiceType: VARIABLE,
           CollectedVariableReference: 'mbz5crwv',
         },
       ],
@@ -260,7 +276,11 @@ describe('remoteToState', () => {
         },
         {
           dimensionType: 'MEASURE',
-          Label: 'measure-radio',
+          Label: 'measure-codeList-radio',
+        },
+        {
+          dimensionType: 'MEASURE',
+          Label: 'measure-variable-radio',
         },
       ],
     };
@@ -283,7 +303,7 @@ describe('remoteToState', () => {
             id: undefined,
             mandatory: undefined,
             visHint: 'SUGGESTER',
-            choiceType: 'SUGGESTER',
+            choiceType: SUGGESTER,
           },
           label: 'measure-suggester',
           type: 'SINGLE_CHOICE',
@@ -294,9 +314,20 @@ describe('remoteToState', () => {
             id: undefined,
             mandatory: undefined,
             visHint: 'RADIO',
-            choiceType: 'CODE_LIST',
+            choiceType: CODE_LIST,
+          },
+          label: 'measure-codeList-radio',
+          type: 'SINGLE_CHOICE',
+        },
+        {
+          SINGLE_CHOICE: {
+            Variable: { id: 'kdyg5y7' },
+            id: undefined,
+            mandatory: undefined,
+            visHint: 'RADIO',
+            choiceType: VARIABLE,
           },
-          label: 'measure-radio',
+          label: 'measure-variable-radio',
           type: 'SINGLE_CHOICE',
         },
       ],
diff --git a/legacy/src/model/transformations/response-format.jsx b/legacy/src/model/transformations/response-format.jsx
index 8022819a5..e3201e099 100644
--- a/legacy/src/model/transformations/response-format.jsx
+++ b/legacy/src/model/transformations/response-format.jsx
@@ -18,13 +18,18 @@ export function remoteToState(
   mandatory,
   /** Add source variable references to response format if the response format is pairing. */
   sourceVariableReferences,
+  /** filter for modalities based on a variable. Only for unique choice questions */
+  optionFilter = '',
 ) {
   let datatypeState = {};
 
   if (type === SIMPLE) {
     datatypeState = ResponseFormatSimple.remoteToState({ responses });
   } else if (type === SINGLE_CHOICE) {
-    datatypeState = ResponseFormatSingle.remoteToState({ responses });
+    datatypeState = ResponseFormatSingle.remoteToState({
+      responses,
+      optionFilter,
+    });
   } else if (type === MULTIPLE_CHOICE) {
     datatypeState = ResponseFormatMultiple.remoteToState({
       responses,
@@ -72,6 +77,7 @@ export function stateToRemote(
       collectedVariables,
     );
     remote.Response = dataTypeRemote.Response;
+    remote.OptionFilter = dataTypeRemote.optionFilter;
   } else if (type === MULTIPLE_CHOICE) {
     dataTypeRemote = ResponseFormatMultiple.stateToRemote(
       responseFormatState,
diff --git a/legacy/src/model/transformations/types.ts b/legacy/src/model/transformations/types.ts
index c916c9bc8..02af07677 100644
--- a/legacy/src/model/transformations/types.ts
+++ b/legacy/src/model/transformations/types.ts
@@ -30,6 +30,7 @@ export type StateResponse = {
   codesListId?: string;
   nomenclatureId?: string;
   variableReferenceId?: string;
+  optionFilter?: string;
   allowArbitraryResponse?: unknown;
   visHint?: DATATYPE_VIS_HINT;
   choiceType?:
diff --git a/legacy/src/utils/variables/collected-variables-single.js b/legacy/src/utils/variables/collected-variables-single.js
index 25b45343a..c1852721a 100644
--- a/legacy/src/utils/variables/collected-variables-single.js
+++ b/legacy/src/utils/variables/collected-variables-single.js
@@ -36,6 +36,7 @@ export function getCollectedVariablesSingle(
         variableReference: form.Variable.id,
         // We need to dynamically get the label of the variable reference, as it can be changed by the user
         variableReferenceLabel: desiredVarLabel,
+        optionFilter: form.Variable.optionFilter,
         type: TEXT,
         choiceType: form.choiceType,
         [TEXT]: { maxLength: 249 },
diff --git a/legacy/src/utils/variables/collected-variables-single.spec.js b/legacy/src/utils/variables/collected-variables-single.spec.js
index 5f81b841e..0387c2bd3 100644
--- a/legacy/src/utils/variables/collected-variables-single.spec.js
+++ b/legacy/src/utils/variables/collected-variables-single.spec.js
@@ -314,6 +314,7 @@ describe('getCollectedVariablesSingle', () => {
         label: 'my-variableRef',
         name: 'my-variableRef-id',
         scope: 'my-variableScope',
+        optionFilter: 'nice filter',
       },
       visHint: 'VARIABLE',
       choiceType: 'VARIABLE',
@@ -327,6 +328,7 @@ describe('getCollectedVariablesSingle', () => {
         label: 'MY_Q label',
         variableReference: 'my-variableRef-id',
         variableReferenceLabel: 'my-variableRef',
+        optionFilter: 'nice filter',
         choiceType: 'VARIABLE',
         type: 'TEXT',
         TEXT: { maxLength: 249 },
diff --git a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.jsx b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.jsx
index 52da74067..6bc78858a 100644
--- a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.jsx
+++ b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.jsx
@@ -5,6 +5,7 @@ import { connect } from 'react-redux';
 import { Field, FormSection } from 'redux-form';
 import { formValueSelector } from 'redux-form';
 
+import { InputWithVariableAutoCompletion } from '@/forms/controls/control-with-suggestions';
 import ListRadios from '@/forms/controls/list-radios';
 import Select from '@/forms/controls/select';
 
@@ -28,6 +29,7 @@ function ResponseFormatSingleVariable({
   selectedScope,
   componentsStore,
   externalLoopsStore,
+  allowFilter = false,
 }) {
   const scopes = getQuestionnaireScope(componentsStore, externalLoopsStore);
 
@@ -58,6 +60,18 @@ function ResponseFormatSingleVariable({
         scope={selectedScope}
       />
 
+      {allowFilter && (
+        <FormSection name={selectorPath}>
+          <Field
+            name="optionFilter"
+            type="text"
+            component={InputWithVariableAutoCompletion}
+            label={Dictionary.modalityFilter}
+            required={false}
+          />
+        </FormSection>
+      )}
+
       <Field
         name="visHint"
         component={ListRadios}
@@ -83,6 +97,7 @@ ResponseFormatSingleVariable.propTypes = {
   selectedScope: PropTypes.string,
   componentsStore: PropTypes.object,
   externalLoopsStore: PropTypes.object,
+  allowFilter: PropTypes.bool,
 };
 
 ResponseFormatSingleVariable.defaultProps = {
@@ -90,6 +105,7 @@ ResponseFormatSingleVariable.defaultProps = {
   selectedScope: '',
   componentsStore: {},
   externalLoopsStore: {},
+  allowFilter: false,
 };
 
 const mapStateToProps = (state, { selectorPathParent }) => {
diff --git a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.spec.jsx b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.spec.jsx
index f6266c962..5baeeacb3 100644
--- a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.spec.jsx
+++ b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single-variable.spec.jsx
@@ -6,9 +6,19 @@ import { combineReducers, createStore } from 'redux';
 import { reducer as formReducer, reduxForm } from 'redux-form';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
+import Input from '@/forms/controls/input';
+
 import Dictionary from '../../../../../utils/dictionary/dictionary';
 import ResponseFormatSingleVariable from './response-format-single-variable';
 
+/*
+  Mock InputWithVariableAutoCompletion as the classic Input,
+  since there are errors when importing antlr-editor in tests
+ */
+vi.mock('@/forms/controls/control-with-suggestions', () => ({
+  InputWithVariableAutoCompletion: (props) => <Input {...props} />,
+}));
+
 vi.mock('@/forms/controls/select', () => ({
   default: ({ children, label, name, onChange }) => (
     <select
@@ -85,9 +95,30 @@ describe('responseFormatSingleVariable', () => {
     vi.clearAllMocks();
   });
 
-  it('should render with scope select and visHint select', () => {
+  it('should render with scope select', () => {
     const { getByText } = renderWithStore(<ResponseFormatSingleVariable />);
     expect(getByText(Dictionary.selectLoop)).toBeInTheDocument();
+  });
+
+  it('should render with variable select', () => {
+    const { getByTestId } = renderWithStore(<ResponseFormatSingleVariable />);
+    expect(getByTestId('variables-list')).toBeInTheDocument();
+  });
+
+  it('should hide option filter field by default', () => {
+    const { queryByText } = renderWithStore(<ResponseFormatSingleVariable />);
+    expect(queryByText(Dictionary.modalityFilter)).not.toBeInTheDocument();
+  });
+
+  it('should render with option filter field when allowing filter', () => {
+    const { getByText } = renderWithStore(
+      <ResponseFormatSingleVariable allowFilter={true} />,
+    );
+    expect(getByText(Dictionary.modalityFilter)).toBeInTheDocument();
+  });
+
+  it('should render with visHint select', () => {
+    const { getByText } = renderWithStore(<ResponseFormatSingleVariable />);
     expect(getByText(Dictionary.radio)).toBeInTheDocument();
     expect(getByText(Dictionary.checkbox)).toBeInTheDocument();
     expect(getByText(Dictionary.dropdown)).toBeInTheDocument();
diff --git a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single.jsx b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single.jsx
index 9a8279d81..fcc221d69 100644
--- a/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single.jsx
+++ b/legacy/src/widgets/component-new-edit/components/response-format/single/response-format-single.jsx
@@ -93,6 +93,7 @@ function ResponseFormatSingle({
         <View key={VARIABLE} value={VARIABLE} label={Dictionary.variable}>
           <ResponseFormatSingleVariable
             selectorPathParent={selectorPathComposed}
+            allowFilter={allowFilter}
           />
         </View>
       </SelectorView>
diff --git a/package.json b/package.json
index 66cbe002b..83a199a2e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pogues",
-  "version": "3.3.1-rc-pairing-rules.1",
+  "version": "3.3.0-rc-filter-variables-ucq.1",
   "description": "Outil de conception et de test de questionnaires.",
   "scripts": {
     "test:next": "cd next && pnpm test",