diff --git a/.changeset/cyan-impalas-protect.md b/.changeset/cyan-impalas-protect.md
new file mode 100644
index 00000000000..3d3dd1d5da8
--- /dev/null
+++ b/.changeset/cyan-impalas-protect.md
@@ -0,0 +1,5 @@
+---
+'@aws-amplify/backend-cli': patch
+---
+
+stackname validation now allows customers to point to nested stack
diff --git a/packages/cli/src/commands/generate/outputs/generate_outputs_command.test.ts b/packages/cli/src/commands/generate/outputs/generate_outputs_command.test.ts
index b6aa2065d76..4496559364f 100644
--- a/packages/cli/src/commands/generate/outputs/generate_outputs_command.test.ts
+++ b/packages/cli/src/commands/generate/outputs/generate_outputs_command.test.ts
@@ -2,7 +2,10 @@ import { beforeEach, describe, it, mock } from 'node:test';
 import { GenerateOutputsCommand } from './generate_outputs_command.js';
 import { ClientConfigFormat } from '@aws-amplify/client-config';
 import yargs, { CommandModule } from 'yargs';
-import { TestCommandRunner } from '../../../test-utils/command_runner.js';
+import {
+  TestCommandError,
+  TestCommandRunner,
+} from '../../../test-utils/command_runner.js';
 import assert from 'node:assert';
 import { AppBackendIdentifierResolver } from '../../../backend-identifier/backend_identifier_resolver.js';
 import { ClientConfigGeneratorAdapter } from '../../../client-config/client_config_generator_adapter.js';
@@ -82,6 +85,37 @@ void describe('generate outputs command', () => {
     );
   });
 
+  void it('generates and writes config for stack with slashes', async () => {
+    await commandRunner.runCommand(
+      'outputs --stack parent/child --out-dir /foo/bar'
+    );
+    assert.equal(generateClientConfigMock.mock.callCount(), 1);
+    assert.deepEqual(generateClientConfigMock.mock.calls[0].arguments[0], {
+      stackName: 'parent/child',
+    });
+  });
+
+  void it('throws an error for invalid stack name', async () => {
+    await assert.rejects(
+      commandRunner.runCommand('outputs --stack 1invalid --out-dir /foo/bar'),
+      (error: TestCommandError) => {
+        assert.strictEqual(error.error.name, 'InvalidStackNameError');
+        assert.strictEqual(error.error.message, 'Invalid stack name: 1invalid');
+        return true;
+      }
+    );
+  });
+
+  void it('accepts valid stack name with hyphens', async () => {
+    await commandRunner.runCommand(
+      'outputs --stack valid-stack-name --out-dir /foo/bar'
+    );
+    assert.equal(generateClientConfigMock.mock.callCount(), 1);
+    assert.deepEqual(generateClientConfigMock.mock.calls[0].arguments[0], {
+      stackName: 'valid-stack-name',
+    });
+  });
+
   void it('generates and writes config for branch', async () => {
     await commandRunner.runCommand(
       'outputs --branch branch_name --out-dir /foo/bar'
diff --git a/packages/cli/src/commands/generate/outputs/generate_outputs_command.ts b/packages/cli/src/commands/generate/outputs/generate_outputs_command.ts
index 0edb427a00e..a9d8bfe0b9d 100644
--- a/packages/cli/src/commands/generate/outputs/generate_outputs_command.ts
+++ b/packages/cli/src/commands/generate/outputs/generate_outputs_command.ts
@@ -55,6 +55,17 @@ export class GenerateOutputsCommand
   handler = async (
     args: ArgumentsCamelCase<GenerateOutputsCommandOptions>
   ): Promise<void> => {
+    if (args.stack) {
+      const identifierRegex = /^[a-zA-Z][-_a-zA-Z0-9/]*$/;
+      if (!args.stack.match(identifierRegex)) {
+        throw new AmplifyUserError('InvalidStackNameError', {
+          message: `Invalid stack name: ${args.stack}`,
+          resolution:
+            'Stack name must start with a letter and can only contain alphanumeric characters, hyphens, underscores and slashes.',
+        });
+      }
+    }
+
     const backendIdentifier =
       await this.backendIdentifierResolver.resolveDeployedBackendIdentifier(
         args