The Mali midfielder has suffered another setback in his recovery from a knee injury which has restricted him to just five appearences since September.
The former Real Madrid star's last outing came in the Spurs defeat at the beginning of December and Jol said: "Diarra is still not right.
"He will need quite a while to come back, hopefully before the end of the season.
"He had an operation, looked better and then had a rest and it was even more painful. Hopefully in the next couple of weeks we will know more."