The trio have been out injured, but could return for this weekend's clash against Watford.
The defender has been out with a hamstring injury picked up in the Champions League defeat to Olympiakos, subsequently missing the impressive 3-0 win over Manchester United.
The Gunners had initially feared that they could lose their star defender for up to a month, which would have been a huge blow, but instead he appears to have made good progress and could feature against Watford on Saturday.
“Koscielny has a slight chance to be back on Saturday. He has a definite test tomorrow,” Wenger told arsenal.com.
The manager has also provided injury updates on midfield duo Mikel Arteta and Mathieu Flamini.
Both players have been out with minor short-term injuries, leaving Wenger short on cover for the central midfield positions, given that Jack Wilshere and Tomas Rosicky are also out injured.
However, both have returned to full training during the international break and Wenger says they will be assessed to see how confident they are, refusing to rule out the chance of them returning alongside Koscielny for the clash with the Hornets.
“Arteta and Flamini are back in full training,” he added.
“We need to see how they are and how confident they are, but we can’t rule it out.”