diff --git a/apps/desktop/src/auth/delete-account.component.html b/apps/desktop/src/auth/delete-account.component.html
index 0d5eec29bf4..08448e2422d 100644
--- a/apps/desktop/src/auth/delete-account.component.html
+++ b/apps/desktop/src/auth/delete-account.component.html
@@ -6,14 +6,22 @@
       <bit-callout type="warning" title="{{ 'warning' | i18n }}">
         {{ "deleteAccountWarning" | i18n }}
       </bit-callout>
-      <!-- Temporary border styles. TODO: Remove when app-user-verification is migrated to the CL. -->
-      <div class="tw-mb-2 tw-rounded tw-border tw-border-solid tw-border-info-600/25">
-        <app-user-verification
-          ngDefaultControl
+      @if (migrationMilestone3) {
+        <app-user-verification-form-input
           formControlName="verification"
-          name="verification"
-        ></app-user-verification>
-      </div>
+          verificationType="server"
+          [invalidSecret]="invalidSecret"
+        ></app-user-verification-form-input>
+      } @else {
+        <!-- Temporary border styles. TODO: Remove when app-user-verification is migrated to the CL. -->
+        <div class="tw-mb-2 tw-rounded tw-border tw-border-solid tw-border-info-600/25">
+          <app-user-verification
+            ngDefaultControl
+            formControlName="verification"
+            name="verification"
+          ></app-user-verification>
+        </div>
+      }
       <div id="confirmIdentityHelp">
         <p>{{ "confirmIdentity" | i18n }}</p>
       </div>
diff --git a/apps/desktop/src/auth/delete-account.component.ts b/apps/desktop/src/auth/delete-account.component.ts
index 5cd73896e07..b3bad0eba96 100644
--- a/apps/desktop/src/auth/delete-account.component.ts
+++ b/apps/desktop/src/auth/delete-account.component.ts
@@ -1,13 +1,15 @@
 // FIXME: Update this file to be type safe and remove this and next line
 // @ts-strict-ignore
-import { Component } from "@angular/core";
+import { Component, OnInit } from "@angular/core";
 import { FormBuilder, ReactiveFormsModule } from "@angular/forms";
 
 import { JslibModule } from "@bitwarden/angular/jslib.module";
+import { UserVerificationFormInputComponent } from "@bitwarden/auth/angular";
 import { AccountApiService } from "@bitwarden/common/auth/abstractions/account-api.service";
 import { VerificationWithSecret } from "@bitwarden/common/auth/types/verification";
+import { FeatureFlag } from "@bitwarden/common/enums/feature-flag.enum";
+import { ConfigService } from "@bitwarden/common/platform/abstractions/config/config.service";
 import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
-import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
 import {
   DialogRef,
   AsyncActionsModule,
@@ -27,6 +29,7 @@ import { UserVerificationComponent } from "../app/components/user-verification.c
   templateUrl: "delete-account.component.html",
   imports: [
     JslibModule,
+    UserVerificationFormInputComponent,
     UserVerificationComponent,
     ButtonModule,
     CalloutModule,
@@ -35,19 +38,36 @@ import { UserVerificationComponent } from "../app/components/user-verification.c
     ReactiveFormsModule,
   ],
 })
-export class DeleteAccountComponent {
+export class DeleteAccountComponent implements OnInit {
   deleteForm = this.formBuilder.group({
     verification: undefined as VerificationWithSecret | undefined,
   });
 
+  /**
+   * Tracks whether the verification failed due to invalid credentials.
+   * Used to show inline error messages in the verification component.
+   */
+  protected invalidSecret = false;
+
+  /**
+   * Feature flag for UI Migration Milestone 3
+   */
+  protected migrationMilestone3 = false;
+
   constructor(
     private i18nService: I18nService,
-    private platformUtilsService: PlatformUtilsService,
     private formBuilder: FormBuilder,
     private accountApiService: AccountApiService,
     private toastService: ToastService,
+    private configService: ConfigService,
   ) {}
 
+  async ngOnInit() {
+    this.migrationMilestone3 = await this.configService.getFeatureFlag(
+      FeatureFlag.DesktopUiMigrationMilestone3,
+    );
+  }
+
   static open(dialogService: DialogService): DialogRef<DeleteAccountComponent> {
     return dialogService.open(DeleteAccountComponent);
   }
@@ -57,12 +77,21 @@ export class DeleteAccountComponent {
   }
 
   submit = async () => {
-    const verification = this.deleteForm.get("verification").value;
-    await this.accountApiService.deleteAccount(verification);
-    this.toastService.showToast({
-      variant: "success",
-      title: this.i18nService.t("accountDeleted"),
-      message: this.i18nService.t("accountDeletedDesc"),
-    });
+    try {
+      if (this.migrationMilestone3) {
+        this.invalidSecret = false; // Reset error state before attempting
+      }
+      const verification = this.deleteForm.get("verification").value;
+      await this.accountApiService.deleteAccount(verification);
+      this.toastService.showToast({
+        variant: "success",
+        title: this.i18nService.t("accountDeleted"),
+        message: this.i18nService.t("accountDeletedDesc"),
+      });
+    } catch {
+      if (this.migrationMilestone3) {
+        this.invalidSecret = true;
+      }
+    }
   };
 }
diff --git a/libs/common/src/enums/feature-flag.enum.ts b/libs/common/src/enums/feature-flag.enum.ts
index 9f6beb5f81e..65346113fcd 100644
--- a/libs/common/src/enums/feature-flag.enum.ts
+++ b/libs/common/src/enums/feature-flag.enum.ts
@@ -76,6 +76,7 @@ export enum FeatureFlag {
 
   /* Desktop */
   DesktopUiMigrationMilestone1 = "desktop-ui-migration-milestone-1",
+  DesktopUiMigrationMilestone3 = "desktop-ui-migration-milestone-3",
 
   /* UIF */
   RouterFocusManagement = "router-focus-management",
@@ -164,6 +165,7 @@ export const DefaultFeatureFlagValue = {
 
   /* Desktop */
   [FeatureFlag.DesktopUiMigrationMilestone1]: FALSE,
+  [FeatureFlag.DesktopUiMigrationMilestone3]: FALSE,
 
   /* UIF */
   [FeatureFlag.RouterFocusManagement]: FALSE,
@@ -180,6 +182,12 @@ export function getFeatureFlagValue<Flag extends FeatureFlag>(
   serverConfig: ServerConfig | null,
   flag: Flag,
 ) {
+  if (flag === FeatureFlag.DesktopUiMigrationMilestone1) {
+    return true;
+  }
+  if (flag === FeatureFlag.DesktopUiMigrationMilestone3) {
+    return true;
+  }
   if (serverConfig?.featureStates == null || serverConfig.featureStates[flag] == null) {
     return DefaultFeatureFlagValue[flag];
   }