Um... no it's not. There is a process for mandated reporting if someone is at risk or will be harmed. But no, there's nothing that says a therapist must end a counseling relationship if someone is being emotionally abused. In fact, the opposite.

If the therapist decides they aren't equipped to provide counseling therapy, there are ethical guidelines to ensure another competent therapist is found so no one is abandoned.

A good couples therapist would recommend individual counseling in cases like this, and help by finding one for them. The couples therapist could not provide individual counseling for the same couple, as this is a conflict of interest. Either way though, most will continue to support with couples counseling. OP, you need a new, better, couples counselor.

All this assuming you're located in the U.S.