Is it permissible for a traveler who cannot perform the Asr prayer at its original time to pray it before its designated time?

It is permissible for a traveler to shorten the four-rak'ah prayers and combine prayers if the distance traveled is 83 km or more. A condition for combining prayers is that the time for the prayer must have begun. So, if someone performs the 'Asr prayer before its time has begun, it is not valid. One must endeavor to perform prayers within their prescribed times. If it is difficult to perform them at their prescribed times due to travel, then it is permissible for the traveler to pray in the mode of transport, while fulfilling as much as possible of the prayer's conditions and pillars.