Suleman and her former bodybuilder beau began dating a few months ago after apparently meeting "through church".
Frankie G said of the romance in June: "Obviously she has a lot of kids, but it's wonderful. I enjoy it. She's a wonderful person - she has a good heart."
A friend of the pair has now revealed to TMZ that they broke up several weeks ago.
The mother of 14 children reportedly chose to split from Frankie G because she is simply too busy to sustain a committed relationship.
Suleman and Frankie G plan to remain friends, according to the informant.
On Monday (July 30), it was reported that Suleman has asked her fans to donate $150,000 (£95,523) for a down payment on a new home.