Bracers of Defense and Wand of Shield can't be used together to cancel 3 damage.

Is this correct per the rules?

One card of one type per check. Both of those cards are items so you have to chose one or another.

You could use wand of defence, arcane shield and chain Mail in one check because They Are different card types.

It never seemed like a check to me before, so I've been playing wrong.

Though there haven't been many times I had 2 magical shieldy items in the physical game.

Thanks Hannibal

Here is one interesting conversation about damage reduction.

http://paizo.com/threads/rzs2scil?Armor-recharging-against-all-damage-in-an#19