Mark Ballas Jaleel White Meltdown Story's BS

4/3/2012 8:30 AM PDT

Mark Ballas -- Jaleel White Meltdown Story is Total BS

Mark Ballas tells TMZ ... he was NOT the target of a Jaleel White meltdown during a "Dancing with the Stars" rehearsal session last week ... despite reports to the contrary.

Mark was leaving Hyde in L.A. last night (the same one Paris, Lindsay and Britney used to party at back in the day) ... when we asked about Jaleel's alleged meltdown ... in which he reportedly screamed at his partner Kym Johnson before going off on Mark.

But Ballas says the whole thing is a "complete fabrication" ... telling us, "We're in L.A. man ... everything's fabricated."