I have not seen a albino deer, but yes there can be albino deer. Any thing can be an albino, with the exception of a few organisms. Albino is just a genetic mutation that does not allow the organism to produce melanine or any other pigments.

I do have some really cool colored deer that frequent my land. They are all bucks that are too small to shoot yet, and they have a real light wheat colored coat. Im curious what they are going to look like in a year or two.