diff --git a/crates/swc/src/config/mod.rs b/crates/swc/src/config/mod.rs
index aea8866aa329..754323fb72c6 100644
--- a/crates/swc/src/config/mod.rs
+++ b/crates/swc/src/config/mod.rs
@@ -1503,7 +1503,6 @@ impl Merge for swc_ecma_parser::TsConfig {
         self.tsx |= from.tsx;
         self.decorators |= from.decorators;
         self.dynamic_import |= from.dynamic_import;
-        self.import_assertions |= from.import_assertions;
     }
 }
 
diff --git a/crates/swc/tests/fixture/issue-2086/input/.swcrc b/crates/swc/tests/fixture/issue-2086/input/.swcrc
index 753c22512462..ddcf2500afe8 100644
--- a/crates/swc/tests/fixture/issue-2086/input/.swcrc
+++ b/crates/swc/tests/fixture/issue-2086/input/.swcrc
@@ -3,8 +3,7 @@
         "parser": {
             "syntax": "typescript",
             "dynamicImport": true,
-            "decorators": true,
-            "importAssertions": true
+            "decorators": true
         },
         "transform": {
             "legacyDecorator": true,
diff --git a/crates/swc/tests/rust_api.rs b/crates/swc/tests/rust_api.rs
index 8e928bf4867f..79840a17baa1 100644
--- a/crates/swc/tests/rust_api.rs
+++ b/crates/swc/tests/rust_api.rs
@@ -135,7 +135,6 @@ fn shopify_2_same_opt() {
                         dynamic_import: true,
                         dts: false,
                         no_early_errors: false,
-                        import_assertions: false,
                     })),
                     transform: None,
                     external_helpers: false,
diff --git a/crates/swc/tests/tsc.rs b/crates/swc/tests/tsc.rs
index c984434e55e2..8e86d9e34ea3 100644
--- a/crates/swc/tests/tsc.rs
+++ b/crates/swc/tests/tsc.rs
@@ -123,7 +123,6 @@ fn compile(input: &Path, output: &Path, opts: Options) {
                                 dynamic_import: true,
                                 dts: false,
                                 no_early_errors: true,
-                                import_assertions: false,
                             })),
                             ..opts.config.jsc
                         },
diff --git a/crates/swc_ecma_dep_graph/src/lib.rs b/crates/swc_ecma_dep_graph/src/lib.rs
index cd014142e869..8c2ce27c9526 100644
--- a/crates/swc_ecma_dep_graph/src/lib.rs
+++ b/crates/swc_ecma_dep_graph/src/lib.rs
@@ -231,7 +231,6 @@ mod tests {
                     dynamic_import: true,
                     decorators: true,
                     no_early_errors: true,
-                    import_assertions: true,
                     ..Default::default()
                 }),
                 EsVersion::Es2015,
diff --git a/crates/swc_ecma_parser/src/lib.rs b/crates/swc_ecma_parser/src/lib.rs
index a2b4c12a277b..1d76b40ae967 100644
--- a/crates/swc_ecma_parser/src/lib.rs
+++ b/crates/swc_ecma_parser/src/lib.rs
@@ -148,10 +148,8 @@ impl Syntax {
         match self {
             Syntax::Es(EsConfig {
                 import_assertions, ..
-            })
-            | Syntax::Typescript(TsConfig {
-                import_assertions, ..
             }) => import_assertions,
+            Syntax::Typescript(_) => true,
         }
     }
 
@@ -314,10 +312,6 @@ pub struct TsConfig {
 
     #[serde(skip, default)]
     pub no_early_errors: bool,
-
-    /// Stage 3.
-    #[serde(default)]
-    pub import_assertions: bool,
 }
 
 #[derive(Debug, Clone, Copy, Default, Serialize, Deserialize)]
diff --git a/crates/swc_ecma_parser/tests/comments.rs b/crates/swc_ecma_parser/tests/comments.rs
index 238891983f3a..3a15551fe2d9 100644
--- a/crates/swc_ecma_parser/tests/comments.rs
+++ b/crates/swc_ecma_parser/tests/comments.rs
@@ -47,7 +47,6 @@ fn test(input: PathBuf) {
                     decorators: true,
                     dynamic_import: true,
                     no_early_errors: true,
-                    import_assertions: true,
                     ..Default::default()
                 }),
                 _ => {
diff --git a/crates/swc_ecma_parser/tests/typescript.rs b/crates/swc_ecma_parser/tests/typescript.rs
index d82f482a3455..aa3550a8785b 100644
--- a/crates/swc_ecma_parser/tests/typescript.rs
+++ b/crates/swc_ecma_parser/tests/typescript.rs
@@ -220,7 +220,6 @@ where
                 tsx: fname.contains("tsx"),
                 dynamic_import: true,
                 decorators: true,
-                import_assertions: true,
                 no_early_errors,
                 ..Default::default()
             }),
diff --git a/crates/swc_ecma_transforms_base/tests/ts_resolver.rs b/crates/swc_ecma_transforms_base/tests/ts_resolver.rs
index ae8c882d6f0e..f9cdef591a7b 100644
--- a/crates/swc_ecma_transforms_base/tests/ts_resolver.rs
+++ b/crates/swc_ecma_transforms_base/tests/ts_resolver.rs
@@ -20,7 +20,6 @@ fn no_empty(input: PathBuf) {
                 decorators: true,
                 dynamic_import: true,
                 no_early_errors: true,
-                import_assertions: true,
                 ..Default::default()
             }),
             EsVersion::latest(),
diff --git a/crates/swc_ecma_transforms_typescript/tests/strip_correctness.rs b/crates/swc_ecma_transforms_typescript/tests/strip_correctness.rs
index 4ad9a3c24ca3..05eb21f0f517 100644
--- a/crates/swc_ecma_transforms_typescript/tests/strip_correctness.rs
+++ b/crates/swc_ecma_transforms_typescript/tests/strip_correctness.rs
@@ -98,7 +98,6 @@ fn identity(entry: PathBuf) {
                 dynamic_import: true,
                 dts: false,
                 no_early_errors: false,
-                import_assertions: true,
             }),
             (&*src).into(),
             None,