Carey faces at least a fortnight out after a challenge by Leeds` Jonny Howson last weekend left him with a bruised shin and ankle.
Cole Skuse or Christian Ribeiro are likely to replace Carey at right-back, although Nicky Hunt is another option for manager Keith Millen.
"That`s not the only selection issue, there are others I need to look at too," said Millen. "We still need to do some work on Leicester, but the lads have been training well and it`s nice to have a full squad to choose from."
On-loan Tottenham duo Steven Caulker and Danny Rose have returned unscathed from international duty with England`s Under-21s, so Nicky Maynard remains the only injury absentee.
Last season`s top scorer has not played this campaign because of a knee injury but the striker is expected to be back in action before Christmas.
Source: PA
Source: PA