Updates on his condition have been scarce but Mourinho confirmed on Friday that his star midfielder is not expected back any time soon.
"He's injured, he cannot play tomorrow," Mourinho told a media conference ahead of Saturday's Premier League clash with Crystal Palace.
"His injury is not one that I can have the hope like I can have with [Antonio] Valencia or [Phil] Jones.
"With them, I have the hope to see them training and to have a positive answer [on their availability soon].
"But with long-term injuries, I don't speak about them, so Ibra, Pogba, [Marcos] Rojo and these players, I don't think about them."
Pogba had scored two goals and provided two assists in four Premier League appearances prior to his injury.