Elliott has missed the Robins’ last three league matches with a calf strain and the veteran defender will not recover in time to face the Bulls, with Keith Lowe set to deputise once more.
Otherwise, manager Mark Yates has a fully-fit and injury-free squad at his disposal.
Jeff Goulding has returned to the starting line-up in recent weeks and the striker will be hoping to keep hold of his place in the face of pressure from Jimmy Spencer and Daryl Duffy.
Midfielder Josh Low will be hoping for a recall, as Cheltenham look to make instant amends for their 4-2 defeat to fellow promotion-chasers Crawley in midweek.
Rangers defender David Bates hopes to show Alex McLeish he is ready for Scotland honours by shutting out Celtic on Sunday.
Roberto Firmino says he is unconcerned as to who Liverpool will be drawn to face in the Champions League quarter-finals.