The World Federation One Stop Fiqh

Ruling 1744

Leaving the place of iʿtikāf  to perform ablution (wuḍūʾ) for an obligatory prayer within its prescribed time (adāʾ) is permitted, even if the time for the prayer has not yet set in. Leaving to perform wuḍūʾ for an obligatory qaḍāʾ prayer – in case there is ample time for performing it – is problematic [i.e. based on obligatory precaution, one must not leave in this case].