Diaby's time at Arsenal has been heavily disrupted by injuries, with the midfielder featuring in just 16 Premier League matches since the start of the 2011-12 campaign.
He has been limited to a solitary League Cup outing this term, having made only one substitute appearance in the previous season.
However, Wenger hinted that a new contract could yet be awarded to Diaby, whose current deal expires in June, if he is able to make an impression over the coming weeks.
"I had a chat with him and told him how I can envisage the future," said the Arsenal manager.
"He has to make a decision. Of course he understands completely that he has to perform and to show that he can be present in a consistent way.
"I will see where we go from there. I wouldn't like to go into details, we have to meet again to see where we go from what I told him.
"It has to be linked a little bit with his presence."
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