diff --git a/eslint.config.mjs b/eslint.config.mjs
index 152c530825e273..84c0df7bb31dd9 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -19,6 +19,7 @@ const { globalIgnores } = await importEslintTool('eslint/config');
 const { default: js } = await importEslintTool('@eslint/js');
 const { default: babelEslintParser } = await importEslintTool('@babel/eslint-parser');
 const babelPluginSyntaxImportSource = resolveEslintTool('@babel/plugin-syntax-import-source');
+const babelPluginImportDefer = resolveEslintTool('@babel/plugin-syntax-import-defer');
 const { default: jsdoc } = await importEslintTool('eslint-plugin-jsdoc');
 const { default: regexpPlugin } = await importEslintTool('eslint-plugin-regexp');
 const { default: markdown } = await importEslintTool('@eslint/markdown');
@@ -105,6 +106,7 @@ export default [
         babelOptions: {
           plugins: [
             babelPluginSyntaxImportSource,
+            babelPluginImportDefer,
           ],
         },
         requireConfigFile: false,
diff --git a/lib/internal/modules/esm/module_job.js b/lib/internal/modules/esm/module_job.js
index 11d5b0a3cb66f9..a09af9ea990b37 100644
--- a/lib/internal/modules/esm/module_job.js
+++ b/lib/internal/modules/esm/module_job.js
@@ -28,6 +28,7 @@ const {
   kErrored,
   kEvaluated,
   kEvaluating,
+  kDeferPhase,
   kEvaluationPhase,
   kInstantiated,
   kUninstantiated,
@@ -164,7 +165,7 @@ class ModuleJobBase {
         debug(`ModuleJobBase.syncLink() ${this.url} -> ${request.specifier}`, job);
         assert(!isPromise(job));
         assert(job.module instanceof ModuleWrap);
-        if (request.phase === kEvaluationPhase) {
+        if (this.shouldRunModule(request.phase)) {
           ArrayPrototypePush(evaluationDepJobs, job);
         }
         modules[idx] = job.module;
@@ -199,6 +200,13 @@ class ModuleJobBase {
       }
     }
   }
+
+  shouldLinkModule(phase) {
+    return phase >= kDeferPhase;
+  }
+  shouldRunModule(phase) {
+    return phase === kEvaluationPhase;
+  }
 }
 
 /* A ModuleJob tracks the loading of a single Module, and the ModuleJobs of
@@ -227,7 +235,7 @@ class ModuleJob extends ModuleJobBase {
       this.modulePromise = PromiseResolve(moduleOrModulePromise);
     }
 
-    if (this.phase === kEvaluationPhase) {
+    if (this.shouldLinkModule(this.phase)) {
       // Promise for the list of all dependencyJobs.
       this.linked = this.link(requestType);
       // This promise is awaited later anyway, so silence
@@ -279,7 +287,7 @@ class ModuleJob extends ModuleJobBase {
       const dependencyJobPromise = this.loader.getOrCreateModuleJob(this.url, request, requestType);
       const modulePromise = PromisePrototypeThen(dependencyJobPromise, (job) => {
         debug(`ModuleJob.asyncLink() ${this.url} -> ${request.specifier}`, job);
-        if (request.phase === kEvaluationPhase) {
+        if (this.shouldRunModule(request.phase)) {
           ArrayPrototypePush(evaluationDepJobs, job);
         }
         return job.modulePromise;
@@ -380,7 +388,7 @@ class ModuleJob extends ModuleJobBase {
   }
 
   runSync(parent) {
-    assert(this.phase === kEvaluationPhase);
+    assert(this.shouldRunModule(this.phase));
     assert(this.module instanceof ModuleWrap);
     let status = this.module.getStatus();
 
@@ -427,7 +435,7 @@ class ModuleJob extends ModuleJobBase {
 
   async run(isEntryPoint = false) {
     debug('ModuleJob.run()', this.module);
-    assert(this.phase === kEvaluationPhase);
+    assert(this.shouldRunModule(this.phase));
     await this.#instantiate();
     if (isEntryPoint) {
       globalThis[entry_point_module_private_symbol] = this.module;
@@ -475,7 +483,7 @@ class ModuleJobSync extends ModuleJobBase {
     assert(this.module instanceof ModuleWrap);
     this.linked = undefined;
     this.type = importAttributes.type;
-    if (phase === kEvaluationPhase) {
+    if (this.shouldLinkModule(phase)) {
       this.linked = this.link(requestType);
     }
   }
@@ -494,7 +502,7 @@ class ModuleJobSync extends ModuleJobBase {
   }
 
   async run() {
-    assert(this.phase === kEvaluationPhase);
+    assert(this.shouldRunModule(this.phase));
     // This path is hit by a require'd module that is imported again.
     const status = this.module.getStatus();
     debug('ModuleJobSync.run()', status, this.module);
@@ -523,7 +531,7 @@ class ModuleJobSync extends ModuleJobBase {
 
   runSync(parent) {
     debug('ModuleJobSync.runSync()', this.module);
-    assert(this.phase === kEvaluationPhase);
+    assert(this.shouldRunModule(this.phase));
     // TODO(joyeecheung): add the error decoration logic from the async instantiate.
     this.module.instantiate();
     // If --experimental-print-required-tla is true, proceeds to evaluation even
diff --git a/src/module_wrap.cc b/src/module_wrap.cc
index 87a8b4d57726af..4f47648f15135f 100644
--- a/src/module_wrap.cc
+++ b/src/module_wrap.cc
@@ -555,6 +555,8 @@ ModulePhase to_phase_constant(ModuleImportPhase phase) {
   switch (phase) {
     case ModuleImportPhase::kEvaluation:
       return kEvaluationPhase;
+    case ModuleImportPhase::kDefer:
+      return kDeferPhase;
     case ModuleImportPhase::kSource:
       return kSourcePhase;
     default:
@@ -1682,6 +1684,7 @@ void ModuleWrap::CreatePerContextProperties(Local<Object> target,
   V(Module::Status, kErrored);
 
   V(ModulePhase, kEvaluationPhase);
+  V(ModulePhase, kDeferPhase);
   V(ModulePhase, kSourcePhase);
 #undef V
 }
diff --git a/src/module_wrap.h b/src/module_wrap.h
index a91a7cb6573415..14a8f1a4f2d611 100644
--- a/src/module_wrap.h
+++ b/src/module_wrap.h
@@ -35,7 +35,8 @@ enum HostDefinedOptions : int {
 
 enum ModulePhase : int {
   kSourcePhase = 1,
-  kEvaluationPhase = 2,
+  kDeferPhase = 2,
+  kEvaluationPhase = 3,
 };
 
 /**
diff --git a/test/es-module/test-defer-import-eval.mjs b/test/es-module/test-defer-import-eval.mjs
new file mode 100644
index 00000000000000..18824a0218db95
--- /dev/null
+++ b/test/es-module/test-defer-import-eval.mjs
@@ -0,0 +1,25 @@
+// Flags: --js-defer-import-eval
+
+// Tests that defer import actually evaluates the imported module
+// only when properties that it exports are accessed.
+
+import '../common/index.mjs';
+import * as assert from 'assert';
+
+globalThis.eval_list = [];
+
+import defer * as deferred from '../fixtures/es-modules/module-deferred-eval.mjs';
+
+assert.strictEqual(globalThis.eval_list.length, 0);
+
+// Attempts to define a property on the deferred module. This should
+// trigger its execution, similar to accessing the `foo` property.
+assert.throws(() => Object.defineProperty(deferred.prop, 'newProp', { value: 15 }), TypeError);
+
+assert.strictEqual(deferred.foo, 42);
+
+// Check that the module has been evaluated at this point.
+assert.partialDeepStrictEqual(['defer-1'], globalThis.eval_list);
+
+// Clean-up
+delete globalThis.eval_list;
diff --git a/test/es-module/test-defer-import-with-module-tree.mjs b/test/es-module/test-defer-import-with-module-tree.mjs
new file mode 100644
index 00000000000000..eec5a9bf997f7e
--- /dev/null
+++ b/test/es-module/test-defer-import-with-module-tree.mjs
@@ -0,0 +1,9 @@
+// Flags: --js-defer-import-eval
+
+import '../common/index.mjs';
+
+import defer * as deferred from '../fixtures/es-modules/module-with-module-tree.mjs';
+
+console.log(deferred.bar);
+
+delete globalThis.eval_list;
diff --git a/test/fixtures/es-modules/module-deferred-eval.mjs b/test/fixtures/es-modules/module-deferred-eval.mjs
new file mode 100644
index 00000000000000..181ac4c07f0600
--- /dev/null
+++ b/test/fixtures/es-modules/module-deferred-eval.mjs
@@ -0,0 +1,8 @@
+if (!globalThis.eval_list) {
+  globalThis.eval_list = [];
+}
+globalThis.eval_list.push('defer-1');
+
+export const foo = 42;
+
+console.log('executed');
diff --git a/test/fixtures/es-modules/module-with-module-tree.mjs b/test/fixtures/es-modules/module-with-module-tree.mjs
new file mode 100644
index 00000000000000..b45cf230fc5046
--- /dev/null
+++ b/test/fixtures/es-modules/module-with-module-tree.mjs
@@ -0,0 +1,3 @@
+import './module-deferred-eval.mjs';
+
+export const bar = 64;
diff --git a/tools/eslint/package-lock.json b/tools/eslint/package-lock.json
index 1859609891f370..dede7fa4aa1967 100644
--- a/tools/eslint/package-lock.json
+++ b/tools/eslint/package-lock.json
@@ -10,6 +10,7 @@
       "dependencies": {
         "@babel/core": "^8.0.0-rc.6",
         "@babel/eslint-parser": "^8.0.0-rc.6",
+        "@babel/plugin-syntax-import-defer": "^8.0.0-rc.6",
         "@babel/plugin-syntax-import-source": "^8.0.0-rc.6",
         "@eslint/js": "^10.0.1",
         "@eslint/markdown": "^8.0.2",
@@ -201,6 +202,21 @@
         "node": "^22.18.0 || >=24.11.0"
       }
     },
+    "node_modules/@babel/plugin-syntax-import-defer": {
+      "version": "8.0.0-rc.6",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-import-defer/-/plugin-syntax-import-defer-8.0.0-rc.6.tgz",
+      "integrity": "sha512-VUzalsGv2W89DJbKyXy8mP7uhsXFZoE4td5iDndOGART94WLXvnKuF72ndJFFYE8t4eRS0zX5PZFmMGBVGmIUw==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/helper-plugin-utils": "^8.0.0-rc.6"
+      },
+      "engines": {
+        "node": "^22.18.0 || >=24.11.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^8.0.0-rc.6"
+      }
+    },
     "node_modules/@babel/plugin-syntax-import-source": {
       "version": "8.0.0-rc.6",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-import-source/-/plugin-syntax-import-source-8.0.0-rc.6.tgz",
diff --git a/tools/eslint/package.json b/tools/eslint/package.json
index dca626efb2baab..0002933967b711 100644
--- a/tools/eslint/package.json
+++ b/tools/eslint/package.json
@@ -5,6 +5,7 @@
   "dependencies": {
     "@babel/core": "^8.0.0-rc.6",
     "@babel/eslint-parser": "^8.0.0-rc.6",
+    "@babel/plugin-syntax-import-defer": "^8.0.0-rc.6",
     "@babel/plugin-syntax-import-source": "^8.0.0-rc.6",
     "@eslint/js": "^10.0.1",
     "@eslint/markdown": "^8.0.2",