Barnsley's home game with Stoke City on Boxing Day has been postponed due to a Covid-19 out break in the Potters' camp.
City have informed the Reds they will be unable to field a team for Sunday's match.
Barnsley's next game is now at Blackburn on December 29.
A club statement read: "Details regarding the rearrangement of this fixture will be communicated to our supporters in due course.
"Supporters who bought a single match ticket for this game and wish to attend the rearranged fixture should retain their ticket as it will remain valid.
"Fans with single match tickets for this fixture who would prefer a refund should contact the Box Office"