Per TMZ Sports, Cameron's lawsuit states Griffin called off their wedding and left her after "cruelly embarrassing his family with his public fawning over Kendall Jenner."
Griffin and Cameron have two children together and had been in a relationship "on and off for eight years."
Cameron's lawsuit says Griffin repeatedly promised to support her after convincing her to leave her job in sports marketing and an interior design business.
Griffin signed a five-year contract extension worth $171.2 million with the Los Angeles Clippers last July. He was traded to the Pistons on Jan. 29. The 28-year-old is averaging 22.4 points and 7.9 rebounds per game this season.