I presume you really meant 0.3 degrees of difference from one side to other. Since you had the mismatch right after an aligment, I'll further presume this is a car with MacPherson strut suspension.
In a MacPherson strut suspension, the strut is a suspension link. Without knowing the exact geometry, nobody can tell you how much you need to raise the one side of the car to equalize the camber.
You may want to see if you can equalize things by taking advantage of the small amount of slop in the strut to spindle mount. It's small, but by moving one side one way and the other side the opposite, you may get things closer. How will you know? A low buck way is to simply place a short level against the wheel. The level does not need to be perpendicular to the spindle, you just need to hold the level in the same place on both wheels/sides. Eyeball where the bubble is in relation to the sighting lines and make sure the other side is the same. You'll have no idea what the actual setting is, but it's pretty accurate for making both sides the same.