Short Answer

There must be at least three adult males present, in addition to the imām (leader). If there are not enough people, the group will pray Zuhr prayer instead. Friday [Jum’ah] Prayer can be prayed in any mosque, building, or even in an open area.

Reason for Asking the Question

Some people find it very difficult to make it to a mosque due to class, work, or some other reason. They know that this prayer is a requirement for adult Muslim males. By knowing the minimum number, they can fulfill the requirement by gathering a few Muslims nearby and hold their own Friday [Jum’ah] Prayer.

Version 0.25

Shaykh Mustafa Umar