JUSTIN BIEBER Alleged Baby Mama DISMISSES Paternity Lawsuit

Justin Bieber's baby mama has dismissed her paternity lawsuit against the singer ... TMZ has learned.

The suit was quietly dismissed late last week.  What's more, Mariah Yeater's lawyers,Lance Rogers and Matt Pare, have quit her ... withdrawn from the case.  

As we first reported, Justin not only planned to take a DNA test when he returned to the U.S., he was going to sue Yeater and her lawyers for making a bogus claim.  And, as we reported, Justin's lawyer, Howard Weitzman, called the attorneys and informed them a suit was looming.