Vanderbeken had a scholarship offer from Oregon State and had received some interest from UCLA.
"He was looking for a place where he can post up and be free to shoot outside," Fleming said. "He likes to shoot the 3s. I think there's a little Canadian connection because (Iowa's) assistant coach (Craig Neal) used to be affiliated with the Toronto Raptors."
Last season, Vanderbeken averaged 28 points and 12 rebounds a game. He impressed the Canadian National Team coach with his postseason play.
"He had an incredible season," Fleming said. "He didn't have much of a supporting cast. He led us to the Ontario provincials."
Fleming said that finding proper competition for Vanderbeken was challenging last year. "It's hard for us to match up. There is one other team in the city that is pretty good but the rest of the time we have to travel to get some competition for him. He needs to play against guys that are 6-foot-10 and 6-foot-9."
For Vanderbeken, Iowa was the fit for the next wave of competition. "I've always been interested and I went on the visit and it seemed like the perfect place for me," Vanderbeken said.
Oregon State was at Vanderbeken's school on Monday but it was too late. Later in the day, Iowa secured the commitment and in turn is the beneficiary of the size the Canadian brings to the table. Last summer, Vanderbeken camped at the Nike All-American Camp in Indianapolis.
Vanderbeken had been a back-up option for UCLA. The Bruins might have brought Vanderbeken in for an official visit next month if it appeared they weren't doing well with their two top frontcourt targets, 6-8 Deon Thompson from Torrance, and 6-9 Alex Stepheson from Harvard-Westlake.