Prayer
A Third Person Joins and Steps Forward as Imam While the Imam Is Bowing
Shaykh Muhammad ibn Salih al-Uthaymeen
Local English rendering of the selected Arabic question and answer. The Arabic source remains authoritative; this is not an official published English edition.
Question
If I am praying with another person as the imam and I am bowing, then a third person joins and steps forward as imam, should he step forward while I am bowing?
Answer (English translation)
Yes, there is no harm. He may step forward whether the imam is bowing or standing.