The school hasn't specified the reason behind Stonum's suspension, but Hoke said in a statement that Stonum will need to "fulfill all his commitments he has to the legal system and our program."
"Darryl made a poor decision that is unacceptable and won't be tolerated," Hoke said in a statement Saturday. "He will be disciplined for behavior that is unbecoming of a Michigan football player."
Stonum, who started 12 games as a junior for coach Rich Rodriguez, finished second on the team in receptions (49) and receiving yards (633) last season, and he tied for second on the squad in receiving touchdowns (4).
"This is a serious situation," Hoke said in the release. "We are disappointed and any athletic department discipline will be handled internally. We will provide the appropriate support and counseling in order for him to learn and grow from this mistake."
The coach said a determination on Stonum's future with the program would be made only after the player fulfills his obligations.
When Stonum was a freshman in the fall of 2008, he was charged with operating a vehicle while intoxicated and driving with a suspended license. Rodriguez sat him out for one game and didn't start him in the next game.
Stonum was sentenced in April 2009 to a year of probation for driving while impaired. He ended up in the Washtenaw County jail from June 4-7 last year because he didn't provide random preliminary breath tests, failed to complete a 10-day work program and didn't report to his probation officer.
"It's a dark moment in my life," Stonum said last year. "I want to get rid of it, get past it and look ahead to the future."
Adam Rittenberg covers Big Ten football for ESPN.com. He can be reached at firstname.lastname@example.org. Information from The Associated Press was used in this report.