Danuel House says he's "sincerely" sorry for his actions that got him booted from the NBA bubble in Sept. ... with the Rockets player telling reporters Wednesday the whole thing was a "mishap."
As we previously reported ... House got punted from Walt Disney World in Orlando after league officials said he violated rules by having an unauthorized guest in his hotel room.
House reportedly allowed a female COVID tester into his room ... which was a big no-no, with the NBA having a strict guest policy to try to limit a potential coronavirus spread.