Not that I’ve ever seen, but I wouldn’t just say “no.” On the other hand, striking with your left hand primarily would put the shield on the less armored side, and armor up your sword arm, giving you free shots at your opponent’s less defended right arm without sacrificing much protection.
EDIT: Immediately after posting I did remember something. You will sometimes see light flexible armor specifically for the swordarm, with no armor anywhere else. This was on the assumption that you’d be using something like a shield or buckler to defend your off side from incoming attacks. A little unusual, and very much a trait of very light or otherwise unarmored combat, but it did occur occasionally. It wasn’t about being left handed, though.