Let us give you the bad news first - the climax of Murder 3 leaves scope for a sequel - i. e., Murder 4. And if you are waiting for some good news, there is none. Murder 3 has neither the erotica quotient that Murder had nor the thriller quotient that Murder 2 had.
In fact, it does not have what the title screams aloud - there is no murder in the movie. All the characters in the film are alive and kicking (pun intended) even at the end of it all. Unfortunately for us, so are we - alive, and kicking ourselves for being so!