What is the ruling on delaying the 'Asr prayer until 3:30, knowing that the Adhan is at 2:40?

The time for the Asr prayer is twofold: an elective time and a compelling time.

The elective time begins when the shadow of everything becomes equal to its length, in addition to the shadow present at midday, and extends until the shadow of everything becomes twice its length. Some say it extends until the sun yellows. The elective time is wider than fifty minutes, and delaying it is permissible if it does not lead to performing the prayer outside the mosque or congregation.

As for the compelling time, it extends until sunset.