Even though outside linebacker Aldon Smith’s nine-game suspension ended on Tuesday, coach Jim Harbaugh of the San Francisco 49ers said there is no guarantee he would be ready to play on Sunday against the New York Giants.

Smith was suspended in August for violating the league’s policy on personal conduct and substance abuse. He was allowed to be with the 49ers (5-4) during his suspension, but could not participate in on-field activities.

“We’re not ready to jump to predict (when he will play),” Harbaugh said, noting that Smith had not taken part in any football activities. “Excited to have him back playing football, with the team. I think that’s where the hope, the excitement lies right now.”

Smith reportedly participated in the 49ers’ walk-through practice on Tuesday. The 49ers have a roster exemption on Smith until Oct. 17.