No, Crowley never came back to Supernatural after his death.
Crowley, the King of Hell, met his end when he sacrificed himself. Growing weary of his role and hoping to put Lucifer in his place, Crowley took his own life. His act was a crucial part of a plan to give the Winchesters enough time to trap Lucifer in another dimension. While the spell to banish Lucifer was not perfectly executed, it did succeed for a period. Following this sacrifice, Crowley was never seen again on the show.
His permanent departure marked a significant turning point in the series, solidifying the finality of his sacrifice.
