The Dons prepare for a run of three games in eight days, starting against Dundee on Sunday.
Already without regular captain Ryan Jack after the midfielder underwent knee surgery, Shinnie was added to the injury list after just 33 minutes of the 1-1 draw with his former club Inverness.
McInnes said: "Graeme got a kick on the foot, and we think it's on the nerve. He had no feeling in his left foot - it was like a pins and needles feeling.
"He tried to stay on and we hoped it would come back but it was clear he had no feeling on it.
"We think it's a nerve thing that should settle within a few days, but it certainly wasn't going to settle within the game."
Source: Sky Sports