Let's see...for a kid who is three...you should probably completely forbid her from ever reading again. She'll be going through Tolstoy by the end of summer. ;-)
Seriously, though, I would just back off and not worry about it. Like others have said, make books available -- maybe take her to the library or to a bookstore and let her choose some books that she might like (but be prepared for her to refuse). Casually ask her at different times if she wants to read...but, again, be prepared for her to refuse. She's just acting her age. :-)
Don't worry. Her skills won't "leave" her. Early reading isn't a straight upward line -- it's a pattern of gain...then plateau...then gain...then another plateau. She'll regain interest at some point and take off again.
