The Spain midfielder was stretchered off after just 12 minutes of his country's World Cup qualification clash with France on Tuesday but could return against Swansea on October 27
Silva was carried off after 12 minutes of Spain's World Cup qualification draw with France on Tuesday and there were initial fears that he could be set for a lengthy spell on the sidelines.
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"We have a lot of injury problems after the international break," Mancini told reporters. "David has a hamstring problem and is not ready for tomorrow.
"We hope that he will be ready for the next Premier League game against Swansea."
The City manager also confirmed that Javi Garcia and Jack Rodwell would be missing for his side's trip to the Hawthorns.
He added: "Javi I think will be out for another week maybe, Jack is out too."