diff --git a/dvc/command/diff.py b/dvc/command/diff.py
index bc96a38f9..d717bf2fd 100644
--- a/dvc/command/diff.py
+++ b/dvc/command/diff.py
@@ -111,14 +111,12 @@ class CmdDiff(CmdBase):
         if not sum(summary.values()):
             return None
 
-        fmt = (
-            "files summary: {added} added, {deleted} deleted,"
-            " {renamed} renamed, {modified} modified"
+        states_summary = ", ".join(
+            f"{summary[state]} {state}"
+            for state in states
+            if summary[state] > 0
         )
-        if not hide_missing:
-            fmt += ", {not in cache} not in cache"
-
-        ui.write(fmt.format_map(summary))
+        ui.write("files summary:", states_summary)
 
     def run(self):
         from dvc.exceptions import DvcException
diff --git a/tests/unit/command/test_diff.py b/tests/unit/command/test_diff.py
index 023ceccb2..70877c33d 100644
--- a/tests/unit/command/test_diff.py
+++ b/tests/unit/command/test_diff.py
@@ -48,8 +48,7 @@ def test_default(mocker, capsys):
         "Renamed:\n"
         "    data{sep}file_old -> data{sep}file_new\n"
         "\n"
-        "files summary: 1 added, 0 deleted, "
-        "1 renamed, 0 modified, 0 not in cache"
+        "files summary: 1 added, 1 renamed"
     ).format(sep=os.path.sep) in capsys.readouterr()[0]
 
 
@@ -99,8 +98,7 @@ def test_show_hash(mocker, capsys):
         "    CCCCCCCC..DDDDDDDD  file1\n"
         "    AAAAAAAA..BBBBBBBB  file2\n"
         "\n"
-        "files summary: 0 added, 2 deleted, "
-        "1 renamed, 2 modified, 0 not in cache"
+        "files summary: 2 deleted, 1 renamed, 2 modified"
     ) in out
 
 
@@ -350,6 +348,6 @@ def test_hide_missing(mocker, capsys):
         "Renamed:\n"
         "    file_old -> file_new\n"
         "\n"
-        "files summary: 1 added, 0 deleted, 1 renamed, 0 modified"
+        "files summary: 1 added, 1 renamed"
     ) in out
     assert "not in cache" not in out