The game will be made up on Friday at 5 p.m. at Forest Hills Northern High School.
"Our thoughts obviously are with them and their program and their school," said Lakers' coach Jeremy Thelen, whose team learned the game was postponed as they were preparing to board the bus and head to Forest Hills Northern.
Spring Lake is ranked No. 1 in Division 2 with a 21-0-1 record, while Unity Christian is 22-2 on the season and ranked No. 3.
The winner advances to next Wednesday's state semifinal contest at Plainwell.