The Imaam Made salaam after the Third Takbeer

Q: Janaa'iz-5: The Imaam of the Janaazah salaah mistakenly made Salaah to one side after the third Takbeer and then remembered only afterwards or after being corrected by a Muqtadi. What should he do?

Answer: If the salaam was made in error, the fourth takbeer should then be made, followed by the salaam. The salaam will then be valid. And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.3