Range adjustments

I usually play 6 max, just wondering when the table drops for 6 to say 3 players what adjustments are made to your range.

Do widen your range, do you defend more, do you 3 bet more, do call more hands

what would be your range in position, SB and BB?

The less the players, the wider range of hands you should be playing. Position is still very important so you don't want to play crap out of position. I don't know why you would want to play 3 handed anyway, since it's almost like heads up. 2-3 handed takes up to much of your time and some people are probably way better at this situation then you are.
Just leave the table when it gets low and find a better table.

I also have wondered this.. I understand that your range should open up when fewer players are at the table.. but what kind of cards are added to your range at this point?

Does it mean like any king or any queen or would that be too loose?

My range goes all the way open with 3 players. You're either a blind or the button, so I open with my entire button range, which is about 54% of hands.

Looks like this:
Pairs: 22+
Aces: A2+
"Big" Card: K7+, Q8+, J8+, T7+
Suited cards: A2s+, K2s+, Q7s+, J7s+
Suited Connects: 23s+
Suited 1 gaps: 24s+
Suited 2 gaps: 25s+
Offsuit SC's: 65o+
Offsuit 1 gaps: 57o+

The other thing I may play are 26s-T6s which aren't in the initial range

I still don't want to be mixing it up oop that often, and I will open up my 3betting range as defense, if my opponent is opening a wider button range. But I'm not 3betting hands like KJs, KQo, things that can really screw me in a 3bet pot. I'm 3betting TT+, AK, maybe AQs/KQs, 86s, 74s, small sc's and gappers. I'd rather call with my hands like KQ, KJ, KTs which have significant equity against my opponent's opening range, but then become crap when he's willing to call my 3bet or 4bets me.