diff --git a/src/sdk/namespace_fs.js b/src/sdk/namespace_fs.js
index f9331a7f8d..6c743606c9 100644
--- a/src/sdk/namespace_fs.js
+++ b/src/sdk/namespace_fs.js
@@ -2768,6 +2768,7 @@ class NamespaceFS {
      * @returns {Promise<string>}
      */
     async _find_version_path(fs_context, { key, version_id }, return_md_path) {
+        key = await this._get_correct_key_path(fs_context, key);
         const cur_ver_path = return_md_path ? this._get_file_md_path({ key }) : this._get_file_path({ key });
         if (!version_id) return cur_ver_path;
 
@@ -2778,6 +2779,27 @@ class NamespaceFS {
         const versioned_path = this._get_version_path(key, version_id);
         return versioned_path;
     }
+    /** 
+    * method append slash at the end of dir key when key misses last slash.
+    * @param {import('./nb').NativeFSContext} fs_context
+    * @param {string} key
+    */
+    async _get_correct_key_path(fs_context, key) {
+        try {
+            let is_dir = false;
+            const key_path = path.normalize(path.join(this.bucket_path, key));
+            const key_state = await nb_native().fs.stat(fs_context, key_path, { skip_user_xattr: true });
+            if (key_state) {
+                is_dir = await native_fs_utils.isDirectory(key_state);
+            }
+            if (is_dir) {
+                key = key.endsWith('/') ? key : path.join(key, '/');
+            }
+        } catch (err) {
+            dbg.warn('NamespaceFS._correct_key_path : error while getting state for key ', key, err);
+        }
+        return key;
+    }
 
     _throw_if_delete_marker(stat, params) {
         if (this.versioning === versioning_status_enum.VER_ENABLED || this.versioning === versioning_status_enum.VER_SUSPENDED) {
diff --git a/src/test/unit_tests/test_namespace_fs.js b/src/test/unit_tests/test_namespace_fs.js
index 641e30a00c..4cefe77bcc 100644
--- a/src/test/unit_tests/test_namespace_fs.js
+++ b/src/test/unit_tests/test_namespace_fs.js
@@ -1,6 +1,6 @@
 /* Copyright (C) 2020 NooBaa */
 /*eslint max-lines-per-function: ["error", 900]*/
-/*eslint max-lines: ["error", 2100]*/
+/*eslint max-lines: ["error", 2200]*/
 'use strict';
 
 const _ = require('lodash');
@@ -472,6 +472,22 @@ mocha.describe('namespace_fs', function() {
 
         });
 
+        mocha.it('delete dir object without last slash - a/b/c', async function() {
+            const source = buffer_utils.buffer_to_read_stream(data);
+            await upload_object(ns_tmp, upload_bkt, dir_1, dummy_object_sdk, source);
+            await delete_object(ns_tmp, upload_bkt, '/a/b/c', dummy_object_sdk);
+
+            let entries;
+            try {
+                entries = await nb_native().fs.readdir(DEFAULT_FS_CONFIG, ns_tmp_bucket_path + dir_2);
+            } catch (e) {
+                assert.ifError(e);
+            }
+            console.log('stop when not empty - entries', entries);
+            assert.strictEqual(entries.length, 1);
+
+        });
+
         mocha.after(async function() {
             let entries_before;
             let entries_after;