my 3 yr old daughter fell at a mall in hampton, VA and cut her forehead and had 3 stitches. can I sue the mall?

Yes, but you will have to show that the fall was due to some negligence on the mall's part, like a spill which had not been cleaned in hours (if it had occurred only minutes before, the mall might not be negligent for having failed to clean it up in that short a time frame.)  If she fell for reasons having nothing to do with the mall's negligence, for example if her shoes were not tied, the mall would have no responsibility.