Ward made 29 saves in a 5-2 loss at the San Jose Sharks on Sunday.
The 35-year-old is 14-11-4 with a 3.72 goals-against average and .893 save percentage in his first season with Chicago (27-30-9), which is eight points behind the Minnesota Wild for the second wild card into the Stanley Cup Playoffs from the Western Conference.
Collin Delia was recalled from Rockford of the American Hockey League on an emergency basis.
The Blackhawks' next game is at home against the Buffalo Sabres on Thursday (8:30 p.m. ET; ESPN+, NBCSCH, MSG-B, NHL.TV).
