A person entered the mosque at the time of the adhaan for ‘Asr, then he prayed and did not wait for the iqaamah (call immediately preceding the prayer) to be given, because he had something to do. Is that permissible or is it not permissible to pray until the iqaamah for the prayer is given?.
Praise be to Allaah.
The Muslim should pray in congregation in the mosque if he is
able to do so.
This has been discussed with the evidence in the answer to
question no. 120
If he has an excuse, then there is nothing wrong with him
praying before the congregational prayer on his own, then leaving.
One excuse is if he remembers that he has some property that
he fears may be stolen, or he has a family member who is sick and he has to
stay with him, or he has an appointment and will be adversely affected by
not attending it, and other excuses that make it permissible to waive the
duty to attend prayer in congregation.