The French boss gave an update regarding his players' fitness after the Gunners dropped points against Swansea City in a 2-2 draw at the Emirates on Tuesday night.
"None of them are close to coming back," Wenger said in his post-match press conference. "Koscielny is out for a while, after that, Ozil is at least two to three weeks.
"Ramsey is maybe the closest. Maybe two weeks, but he's had little setbacks. Sometimes scar tissue will bleed a little bit and we have to slow down again. When a guy has a tendon injuy in a very sensitive place it's difficult. You always have to push, but not too far."
Arsenal are currently fourth in the Premier League table, six points adrift of leaders Chelsea.