Phillies manager Rob Thomson said Realmuto is available for Sunday's game against the Diamondbacks only in an emergency while contending with a sore foot, Ty Daubert of PhilliesNation.com reports.
Thomson indicated that Realmuto wasn't in line for a day off Sunday, but the Phillies are choosing to hold him out after the backstop took a foul ball off his foot during Saturday's 4-3 win. Rafael Marchan will handle catching duties in the series finale, but Realmuto could be ready to step back in behind the plate for Monday's game against the Cubs.