How Can I Make Invoke independent of Time.timescale ?

I meant I want to use Invoke based on the real timing no the game time
Take a look:

Code (CSharp):

1.  public void Resume()
2.     {
3.         //Resume the game
4.         pauseMenuPanel.SetActive(false);
5.         Invoke("timeUnFreeze", 3f);
6.         isPaused = false;
7.     }
8.  
9. public void timeUnFreeze()
10.     {
11.         Time.timeScale = 1f;
12.     }

so i want to resume the time after 3 seconds (in real time) of the click on the ResumeButton

 

@RyanGamingKob

Maybe use coroutine instead of Invoke and add Time.unscaledDeltaTime to your timer instead of Time.deltaTime, that way it isn't affected by timeScale that is set to 0.

 

can i use Time.unscaledDeltaTime only? and how