Yes, you can. Get one family member to check in separately to singapore and not part of the group, and specifically request for that one bag to go to sinagpore only. Cos if checked in as a group. All the suitcases have to go to the final destination. All or nothing . So u hv to split up. This has sometimes worked for me. Recently in Feb 2023, from SFO to SIN to DPS, i asked and I was told I could not due to aviation safety rules. And we had to check in all our suitcases to DPS.

Alternatively.. put all your one day trip necessities into your hand carry luggages....( no liquid or gel above 100ml) to save the hassle.