Pogba, who damaged his hamstring in a Champions League clash with Basel on September 12, has only just started training again.
Mourinho, increasingly frustrated at the timescale of his return, said: “I am not in control of his recovery — he is not training with me.
“When a player is on individual work, I can’t predict. I expect Marcos Rojo back after the international break. But Paul — I have no idea.”
There are reports of Pogba being fit for next week’s clash with Chelsea.