I don't see a problem but there are a few factors that change things a bit.
Prior to 3.x it didn't really matter what your attributes were and I think you didn't even start getting a minus one till like 6 or less, a 3 simply wasn't going to have much impact on play.
Roll stats in order vrs roll stats and assign as desired could make a difference. A 3 in con might not matter much to a spellcaster or bow user but might be fairly crippling to a fighter type build array. Asking to swap the three to an attrib that makes sense in ways not putting the party at risk is reasonable
Prior to 3.x it didn't really matter what your attributes were and I think you didn't even start getting a minus one till like 6 or less, a 3 simply wasn't going to have much impact on play.
Roll stats in order vrs roll stats and assign as desired could make a difference. A 3 in con might not matter much to a spellcaster or bow user but might be fairly crippling to a fighter type build array. Asking to swap the three to an attrib that makes sense in ways not putting the party at risk is reasonable


