diff --git a/apps/backend/db_patches/0214_addMultiInstrumentJustification.sql b/apps/backend/db_patches/0214_addMultiInstrumentJustification.sql
new file mode 100644
index 0000000000..8c1e58acb4
--- /dev/null
+++ b/apps/backend/db_patches/0214_addMultiInstrumentJustification.sql
@@ -0,0 +1,16 @@
+DO
+$$
+BEGIN
+    IF register_patch('addMultiInstrumentJustification.sql', 'Zachary Hankin', 'Adds the option to request justification for multiple instrument use from the user', '2026-6-15') THEN
+        UPDATE questions
+        SET default_config = jsonb_set(
+            default_config::jsonb,
+            '{multiJustificationRequired}',
+            'false'::jsonb,
+            true
+        )
+        WHERE data_type = 'INSTRUMENT_PICKER';
+    END IF;
+END;
+$$
+LANGUAGE plpgsql;
diff --git a/apps/backend/src/models/questionTypes/InstrumentPicker.ts b/apps/backend/src/models/questionTypes/InstrumentPicker.ts
index f4d5734a89..d73abc6bf7 100644
--- a/apps/backend/src/models/questionTypes/InstrumentPicker.ts
+++ b/apps/backend/src/models/questionTypes/InstrumentPicker.ts
@@ -40,6 +40,7 @@ export const instrumentPickerDefinition: Question<DataType.INSTRUMENT_PICKER> =
       config.isMultipleSelect = false;
       config.requestTime = false;
       config.readPermissions = [];
+      config.multiJustificationRequired = false;
 
       return config;
     },
diff --git a/apps/backend/src/resolvers/types/FieldConfig.ts b/apps/backend/src/resolvers/types/FieldConfig.ts
index dd845a0bbe..de25bd70f8 100644
--- a/apps/backend/src/resolvers/types/FieldConfig.ts
+++ b/apps/backend/src/resolvers/types/FieldConfig.ts
@@ -207,6 +207,9 @@ export class InstrumentPickerConfig extends ConfigBase {
 
   @Field(() => Boolean)
   requestTime: boolean;
+
+  @Field(() => Boolean)
+  multiJustificationRequired: boolean;
 }
 
 @ObjectType()
diff --git a/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionInstrumentPickerFormCommon.tsx b/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionInstrumentPickerFormCommon.tsx
index dcafde8c4c..281d7354cd 100644
--- a/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionInstrumentPickerFormCommon.tsx
+++ b/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionInstrumentPickerFormCommon.tsx
@@ -20,6 +20,8 @@ export const QuestionInstrumentPickerFormCommon = ({
   const [showIsMultipleSelectCheckbox, setShowIsMultipleSelectCheckbox] =
     useState(config.variant === 'dropdown');
 
+  const [showJustification, setShowJustification] = useState(false);
+
   return (
     <>
       <TitledContainer label="Constraints">
@@ -54,17 +56,6 @@ export const QuestionInstrumentPickerFormCommon = ({
           />
         </FormControl>
 
-        {showIsMultipleSelectCheckbox && (
-          <Field
-            name="config.isMultipleSelect"
-            component={CheckboxWithLabel}
-            type="checkbox"
-            Label={{
-              label: 'Is multiple select',
-            }}
-            data-cy="is-multiple-select"
-          />
-        )}
         <Field
           name="config.requestTime"
           component={CheckboxWithLabel}
@@ -74,6 +65,28 @@ export const QuestionInstrumentPickerFormCommon = ({
           }}
           data-cy="request-time"
         />
+        {showIsMultipleSelectCheckbox && (
+          <Field
+            name="config.isMultipleSelect"
+            component={CheckboxWithLabel}
+            type="checkbox"
+            Label={{ label: 'Is multiple select' }}
+            data-cy="is-multiple-select"
+            // Using onInput instead of onChange because onChange overwrites the formik handler.
+            onInput={(event: React.ChangeEvent<HTMLInputElement>) => {
+              setShowJustification(event.target.checked);
+            }}
+          />
+        )}
+        {showIsMultipleSelectCheckbox && showJustification && (
+          <Field
+            name="config.multiJustificationRequired"
+            component={CheckboxWithLabel}
+            type="checkbox"
+            Label={{ label: 'Justification Required for Multi Instruments' }}
+            data-cy="is-multi-just-req"
+          />
+        )}
       </TitledContainer>
     </>
   );
diff --git a/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionaryComponentInstrumentPicker.tsx b/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionaryComponentInstrumentPicker.tsx
index f2f46a2b0a..091f74e8e4 100644
--- a/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionaryComponentInstrumentPicker.tsx
+++ b/apps/frontend/src/components/questionary/questionaryComponents/InstrumentPicker/QuestionaryComponentInstrumentPicker.tsx
@@ -271,6 +271,20 @@ export function QuestionaryComponentInstrumentPicker(
           {config.requestTime && requestTimeForInstrument && (
             <DynamicTimeFields />
           )}
+          {config.requestTime &&
+            requestTimeForInstrument &&
+            config.multiJustificationRequired && (
+              <TextField
+                key={'Multi-Instrument Justification textbox'}
+                required={config.multiJustificationRequired}
+                error={isError}
+                label={`Justify multiple instrument use:`}
+                type="string"
+                onChange={(e: React.ChangeEvent<HTMLTextAreaElement>) => {
+                  onComplete(e.target.value);
+                }}
+              />
+            )}
           {isError && <DisplayErrorMessage />}
         </FormControl>
       );
diff --git a/apps/frontend/src/graphql/template/fragment.fieldConfig.graphql b/apps/frontend/src/graphql/template/fragment.fieldConfig.graphql
index e0b3ba81be..95c7af02b4 100644
--- a/apps/frontend/src/graphql/template/fragment.fieldConfig.graphql
+++ b/apps/frontend/src/graphql/template/fragment.fieldConfig.graphql
@@ -213,6 +213,7 @@ fragment fieldConfig on FieldConfig {
     readPermissions
     isMultipleSelect
     requestTime
+    multiJustificationRequired
     instruments {
       id
       name