Is it permissible for a latecomer to join a Masbooq in Salaat?

Answer

You may not join a Masbooq (one who is performing his missed raka'ts after the Imaam has completed the Salaat) to form a jamaat. If you have missed the Jamaat, then perform Salaat alone if there is no one to join you. In terms of the Hanafi Math-hab joining a Masbooq is not valid. This, however, is permissible for Shaafi's.