The centre half picked up his fifth booking against Burnley on Tuesday night and will serve a one match ban.
Elliott Ward is set to replace him with City boss Chris Coleman saying to the CT:" "Scott has got a suspension for the cup replay so Elliott has to come in and do what he did in the first game at Ewood Park, playing with that bit of aggression that is sometimes lacking."
Tickets for the Cup replay are now on general sale and are priced at £20 adults and £10 concessions.