The defender has fallen down the pecking order at the North London outfit due to the regular pairing of Per Mertesacker and Laurent Koscielny at the back.
"I'll have to think about that when it's necessary," The Express quotes Vermaelen as saying. "January is still a few months ahead.
"I have spoken to the manager but it will remain private between us. Things can happen in a split second and change my situation.
"That can happen tomorrow or next weekend. In that case, we will speak differently in January. I have to be ready for that."
The Belgium international has made just two appearances for the Gunners this season.