Mustafi, along with the rest of his Arsenal team-mates, is currently staying fit by training alone after London was put into lockdown on Monday due to the coronavirus.
"We are in a situation where everyone is worried about the current situation and not so much about their personal future," Mustafi told Sky Deutschland.
"It is difficult to think about my personal future.
"None of us know what will happen next and when we can play again. So, once we have overcome this difficult time and are back on the pitch, I can think about questions like that.
"At the moment I don't think about it. Also the club has more important stuff to deal with right now than my future."