The shooting happened after a late-morning counseling session between a man and a woman at the Arbor Circle counseling center on Ball Street.
"After the session, they went into their vehicle," Grand Rapids Police Chief Kevin Belk said. "There was a shot heard. When investigators got there, we found two females deceased, (ages) 21 and 31, and a 27-year old male with a self-inflicted gun wound."
Police believe the man killed the two women before shooting himself. He was taken to a hospital, but died a short time later.
Belk said the man and one of the women had a child together. As of Monday night, police were unsure of the motive.
The staff and clients inside the facility were told to stay inside until the investigation was complete.
Arbor Circle CEO Jack Greenfield said the scene was difficult to understand.
"It's a very tragic situation that creates trauma within people's lives as they think about most recent difficulties in Connecticut," he said. "People are on edge anyway."