diff --git a/gdextension/gdextension_interface.h b/gdextension/gdextension_interface.h
index cb91a476..659d266a 100644
--- a/gdextension/gdextension_interface.h
+++ b/gdextension/gdextension_interface.h
@@ -499,6 +499,8 @@ typedef void (*GDExtensionScriptInstanceFreeMethodList)(GDExtensionScriptInstanc
 
 typedef GDExtensionBool (*GDExtensionScriptInstanceHasMethod)(GDExtensionScriptInstanceDataPtr p_instance, GDExtensionConstStringNamePtr p_name);
 
+typedef GDExtensionInt (*GDExtensionScriptInstanceGetMethodArgumentCount)(GDExtensionScriptInstanceDataPtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionBool *r_is_valid);
+
 typedef void (*GDExtensionScriptInstanceCall)(GDExtensionScriptInstanceDataPtr p_self, GDExtensionConstStringNamePtr p_method, const GDExtensionConstVariantPtr *p_args, GDExtensionInt p_argument_count, GDExtensionVariantPtr r_return, GDExtensionCallError *r_error);
 typedef void (*GDExtensionScriptInstanceNotification)(GDExtensionScriptInstanceDataPtr p_instance, int32_t p_what); // Deprecated. Use GDExtensionScriptInstanceNotification2 instead.
 typedef void (*GDExtensionScriptInstanceNotification2)(GDExtensionScriptInstanceDataPtr p_instance, int32_t p_what, GDExtensionBool p_reversed);
@@ -555,7 +557,7 @@ typedef struct {
 
 	GDExtensionScriptInstanceFree free_func;
 
-} GDExtensionScriptInstanceInfo; // Deprecated. Use GDExtensionScriptInstanceInfo2 instead.
+} GDExtensionScriptInstanceInfo; // Deprecated. Use GDExtensionScriptInstanceInfo3 instead.
 
 typedef struct {
 	GDExtensionScriptInstanceSet set_func;
@@ -596,7 +598,50 @@ typedef struct {
 
 	GDExtensionScriptInstanceFree free_func;
 
-} GDExtensionScriptInstanceInfo2;
+} GDExtensionScriptInstanceInfo2; // Deprecated. Use GDExtensionScriptInstanceInfo3 instead.
+
+typedef struct {
+	GDExtensionScriptInstanceSet set_func;
+	GDExtensionScriptInstanceGet get_func;
+	GDExtensionScriptInstanceGetPropertyList get_property_list_func;
+	GDExtensionScriptInstanceFreePropertyList free_property_list_func;
+	GDExtensionScriptInstanceGetClassCategory get_class_category_func; // Optional. Set to NULL for the default behavior.
+
+	GDExtensionScriptInstancePropertyCanRevert property_can_revert_func;
+	GDExtensionScriptInstancePropertyGetRevert property_get_revert_func;
+
+	GDExtensionScriptInstanceGetOwner get_owner_func;
+	GDExtensionScriptInstanceGetPropertyState get_property_state_func;
+
+	GDExtensionScriptInstanceGetMethodList get_method_list_func;
+	GDExtensionScriptInstanceFreeMethodList free_method_list_func;
+	GDExtensionScriptInstanceGetPropertyType get_property_type_func;
+	GDExtensionScriptInstanceValidateProperty validate_property_func;
+
+	GDExtensionScriptInstanceHasMethod has_method_func;
+
+	GDExtensionScriptInstanceGetMethodArgumentCount get_method_argument_count_func;
+
+	GDExtensionScriptInstanceCall call_func;
+	GDExtensionScriptInstanceNotification2 notification_func;
+
+	GDExtensionScriptInstanceToString to_string_func;
+
+	GDExtensionScriptInstanceRefCountIncremented refcount_incremented_func;
+	GDExtensionScriptInstanceRefCountDecremented refcount_decremented_func;
+
+	GDExtensionScriptInstanceGetScript get_script_func;
+
+	GDExtensionScriptInstanceIsPlaceholder is_placeholder_func;
+
+	GDExtensionScriptInstanceSet set_fallback_func;
+	GDExtensionScriptInstanceGet get_fallback_func;
+
+	GDExtensionScriptInstanceGetLanguage get_language_func;
+
+	GDExtensionScriptInstanceFree free_func;
+
+} GDExtensionScriptInstanceInfo3;
 
 /* INITIALIZATION */
 
@@ -2378,7 +2423,7 @@ typedef void (*GDExtensionInterfaceRefSetObject)(GDExtensionRefPtr p_ref, GDExte
 /**
  * @name script_instance_create
  * @since 4.1
- * @deprecated in Godot 4.2. Use `script_instance_create2` instead.
+ * @deprecated in Godot 4.2. Use `script_instance_create3` instead.
  *
  * Creates a script instance that contains the given info and instance data.
  *
@@ -2392,6 +2437,7 @@ typedef GDExtensionScriptInstancePtr (*GDExtensionInterfaceScriptInstanceCreate)
 /**
  * @name script_instance_create2
  * @since 4.2
+ * @deprecated in Godot 4.3. Use `script_instance_create3` instead.
  *
  * Creates a script instance that contains the given info and instance data.
  *
@@ -2402,6 +2448,19 @@ typedef GDExtensionScriptInstancePtr (*GDExtensionInterfaceScriptInstanceCreate)
  */
 typedef GDExtensionScriptInstancePtr (*GDExtensionInterfaceScriptInstanceCreate2)(const GDExtensionScriptInstanceInfo2 *p_info, GDExtensionScriptInstanceDataPtr p_instance_data);
 
+/**
+ * @name script_instance_create3
+ * @since 4.3
+ *
+ * Creates a script instance that contains the given info and instance data.
+ *
+ * @param p_info A pointer to a GDExtensionScriptInstanceInfo3 struct.
+ * @param p_instance_data A pointer to a data representing the script instance in the GDExtension. This will be passed to all the function pointers on p_info.
+ *
+ * @return A pointer to a ScriptInstanceExtension object.
+ */
+typedef GDExtensionScriptInstancePtr (*GDExtensionInterfaceScriptInstanceCreate3)(const GDExtensionScriptInstanceInfo3 *p_info, GDExtensionScriptInstanceDataPtr p_instance_data);
+
 /**
  * @name placeholder_script_instance_create
  * @since 4.2
diff --git a/include/godot_cpp/godot.hpp b/include/godot_cpp/godot.hpp
index 3bc6ab79..8fb4eb8c 100644
--- a/include/godot_cpp/godot.hpp
+++ b/include/godot_cpp/godot.hpp
@@ -171,7 +171,7 @@ extern "C" GDExtensionInterfaceCallableCustomCreate2 gdextension_interface_calla
 extern "C" GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata;
 extern "C" GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object;
 extern "C" GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object;
-extern "C" GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2;
+extern "C" GDExtensionInterfaceScriptInstanceCreate3 gdextension_interface_script_instance_create3;
 extern "C" GDExtensionInterfacePlaceHolderScriptInstanceCreate gdextension_interface_placeholder_script_instance_create;
 extern "C" GDExtensionInterfacePlaceHolderScriptInstanceUpdate gdextension_interface_placeholder_script_instance_update;
 extern "C" GDExtensionInterfaceClassdbConstructObject gdextension_interface_classdb_construct_object;
diff --git a/src/godot.cpp b/src/godot.cpp
index a6b7ad63..d1413a62 100644
--- a/src/godot.cpp
+++ b/src/godot.cpp
@@ -177,7 +177,7 @@ GDExtensionInterfaceCallableCustomCreate2 gdextension_interface_callable_custom_
 GDExtensionInterfaceCallableCustomGetUserData gdextension_interface_callable_custom_get_userdata = nullptr;
 GDExtensionInterfaceRefGetObject gdextension_interface_ref_get_object = nullptr;
 GDExtensionInterfaceRefSetObject gdextension_interface_ref_set_object = nullptr;
-GDExtensionInterfaceScriptInstanceCreate2 gdextension_interface_script_instance_create2 = nullptr;
+GDExtensionInterfaceScriptInstanceCreate3 gdextension_interface_script_instance_create3 = nullptr;
 GDExtensionInterfacePlaceHolderScriptInstanceCreate gdextension_interface_placeholder_script_instance_create = nullptr;
 GDExtensionInterfacePlaceHolderScriptInstanceUpdate gdextension_interface_placeholder_script_instance_update = nullptr;
 GDExtensionInterfaceClassdbConstructObject gdextension_interface_classdb_construct_object = nullptr;
@@ -417,7 +417,7 @@ GDExtensionBool GDExtensionBinding::init(GDExtensionInterfaceGetProcAddress p_ge
 	LOAD_PROC_ADDRESS(callable_custom_get_userdata, GDExtensionInterfaceCallableCustomGetUserData);
 	LOAD_PROC_ADDRESS(ref_get_object, GDExtensionInterfaceRefGetObject);
 	LOAD_PROC_ADDRESS(ref_set_object, GDExtensionInterfaceRefSetObject);
-	LOAD_PROC_ADDRESS(script_instance_create2, GDExtensionInterfaceScriptInstanceCreate2);
+	LOAD_PROC_ADDRESS(script_instance_create3, GDExtensionInterfaceScriptInstanceCreate3);
 	LOAD_PROC_ADDRESS(placeholder_script_instance_create, GDExtensionInterfacePlaceHolderScriptInstanceCreate);
 	LOAD_PROC_ADDRESS(placeholder_script_instance_update, GDExtensionInterfacePlaceHolderScriptInstanceUpdate);
 	LOAD_PROC_ADDRESS(classdb_construct_object, GDExtensionInterfaceClassdbConstructObject);