Veteran centre-back Carey was dismissed during the Robins' 1-0 defeat at Reading last time out for "denying a goalscoring opportunity" and, after City decided not to appeal the decision, will serve a one-match ban.
However, manager Derek McInnes has been buoyed by the return to training of Marvin Elliott and Liam Fontaine.
Midfielder Elliott had been struggling with the hamstring injury he picked up during the 1-0 victory over Millwall at Ashton Gate on January 3, while defender Fontaine has recovered from a knee injury, and both could feature on Saturday.
Striker David Clarkson will not be involved, however, after picking up an ankle fracture which will keep him out for the rest of the season.
On-loan forward Chris Wood will continue to lead the line following the sale of Nicky Maynard to West Ham on deadline day.
Bristol City last week