The 23-year-old forward recently returned to the club after being sent to a conditioning camp in France to help him lose weight and regain fitness.
"Saido's getting on with his job. We need to get games into him. He is nowhere near ready we think to start a game of football so it's just about him getting games and that is what we are trying to do," Pulis said.
Pulis was then asked if it was a mental or physical issue affecting Berahino and he added: "It's both. He's trained every day and it's now just about getting him some games."
His continued absence has led to renewed talk of a move away from the club in January.
"We'll wait and see (if there is a possibility of him leaving in the January window). Every window has brought speculation and we have another four or five weeks to get through that," Pulis added.