Six Wisconsin lawmakers this week condemned what they said was a lenient three-year prison sentence given to a former University of Wisconsin student who admitted to sexually assaulting three women and choking or stalking two others.

The student, Alec Cook, 22, was initially charged with 23 crimes involving 11 female accusers, after the women began coming forward in 2016. In February, Mr. Cook pleaded guilty to five of those crimes — three counts of third-degree sexual assault, one count of strangulation and one count of stalking, collectively involving five different women — as part of a deal with prosecutors.

Prosecutors had asked that he be sentenced to 19½ years in prison; Mr. Cook’s lawyers had recommended eight years of probation.

On June 21, the judge, Stephen Ehlke of Dane County Circuit Court, sentenced Mr. Cook to three years in prison, followed by five years of extended supervision and three years of probation. He also ordered Mr. Cook to register as a sex offender until he reaches age 48, one of Mr. Cook’s lawyers said.