Answer:
(Fatwa: 643/595=D)
(1) You should wait until they perform the missed rakats and other sunnah salah.
(2) Wait till they complete.
(3) It may affect their salah.
(4) In case of disturbing and troubling, one may be sinful.
(5) If not disturbing, one can announce in one or two short sentences. (This ruling is when there are some people making up their missed salah; otherwise long announcements also can be made.)
(6) You can pray sunnah in some corner by diverting your mind.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
