"It affected him deeply and I didn't recognize the player I saw on Friday night on Tuesday night.
"I will talk with him. What I will want from him is that he's completely committed and feels ready. If not, I will not play him."
Wenger says he felt shock more than fear last Friday in the French capital and is worried about the continued repercussions.
"Nobody in France has found an answer or a real explanation for what's going on and why," he said.
"What was targeted was the way of life, basically: football, going out, listening to music.
"I am more worried that it could divide the society and create some tensions inside the country that could damage the tolerant and multi-cultural society.
"You have to trust politicians to make the right decisions to counter attack against that."
France is scheduled to host the European Championship finals next summer.
Wenger added: "I feel the country can provide (a safe environment).
"One of the good things out of what happened now is that the security level will be raised and maybe the 2016 Euro in France will be more secure."
The Premier League is considering playing the French national anthem before all matches this weekend as a mark of respect.
Wenger added: "Symbolically it's a very nice gesture. I think it's a nice gesture of solidarity."
Arsenal resume Premier League action level with leaders Manchester City.
Full-back Hector Bellerin (groin) is set to be available again, but both midfielder Alex Oxlade-Chamberlain and Aaron Ramsey (both hamstring) remain out and Theo Walcott (calf) is not expected back for "one or two weeks".
Wenger played down suggestions new deals were imminent for key men Mesut Ozil and Alexis Sanchez.
"We have some time. We are not in a hurry. We want of course for them to stay at the club," the Arsenal boss said.