The Aston Villa full-back, whose deal is set to expire before Saturday's trip to Pride Park to face East Midlands rivals Derby, must serve a one-match suspension following his red card against his former club Reading earlier this month.
His absence could see midfielder Chris Cohen revert to left-back, although Reds boss Billy Davies could also use Chris Gunter as cover with James Perch filling in for him at right-back.
Defender Julian Bennett remains the only injury absentee as he continues his rehabilitation from knee surgery.
Victory for Forest would see them go level on points with Championship leaders Newcastle, who play 24 hours later when Crystal Palace visit St James' Park.
