Why are Singapore visa applications from Pakistan rejected?

A Singapore application from a Pakistani traveller that's delayed or refused usually trips on something practical: incomplete or inconsistent information, a passport short on validity, weak proof of funds or onward travel, or an unresolved matter from an earlier trip. With Assessment Level II scrutiny, gaps surface readily.

A request for more information, or a hold while ICA checks a detail, is more common than an outright refusal of a normal visit. Both still eat into the time you have before departure.

After a refusal there's no published clock to count down. Wait, work out what fell short, and resubmit a stronger, fully consistent file, taking the timing from current ICA guidance rather than a fixed assumption. A clean first application is what keeps you out of that loop.