When the time of Salah is due, it is obligatory upon anyone who cannot offer it due to their being tied up to offer it in the manner that suits their circumstances. Allah (Glorified and Exalted be He) said:
So keep your duty to Allâh and fear Him as much as you can
The Prophet (peace be upon him) said:
When I command you to do anything, do of it as much as you possibly can.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.