The school announced the dismissal Tuesday, less than two weeks after Stonum was jailed for violating his probation. He was ticketed for driving on a revoked driver's license, which violated his probation following a May 2011 arrest for driving while visually impaired.
"I love Darryl and wish him nothing but the absolute best," Michigan coach Brady Hoke said in a statement. "However, there is a responsibility and a higher standard you must be accountable to as a University of Michigan football student-athlete. That does not and will not change. It's unfortunate because I believe he has grown a great deal as a person since the beginning of the season. My hope is that maturing process continues."
The 10-day jail term was the latest in a litany of alcohol-related legal issues for the Stafford, Texas native.
The May 2011 drunken driving arrest was Stonum's second while at Michigan. The 21-year-old was previously arrested for operating a vehicle while visibly impaired in Sept. 2008. He then violated his probation from that arrest, landing him in jail for three days in the summer of 2010.
"I appreciate everything the University of Michigan, Dave Brandon and Coach Hoke have done for me," Stonum said in a statement released by the school. "I look forward to continuing my football career down the road, but more importantly, right now I'm focused on graduating from Michigan this spring. I understand only I am responsible for my actions. I'm sad about how all of this turned out, but I completely understand.
"I love this school and my team and will miss them all greatly. But I'll always be a Wolverine. I know I have grown and matured as a person over the last nine months, and I will continue to learn and grow every day. I want to thank everyone for all of their support, and I hope they will support me in the future."
The 6-foot-2, 195-pound Stonum missed last season after redshirting following an indefinite suspension stemming from the second DUI arrest. He caught 76 passes for 1,008 yards and six touchdowns in his career.
He was also a kick returner for the Wolverines and holds Michigan's single-season kick return yardage mark, with 1,001 yards in 2009.
Michael Rothstein writes about Michigan athletics for WolverineNation.com.