Should I get Invisalign or a veneer for my left lateral incisor? (Photo)

Being embarrassed to smile is a serious problem and can negatively affect social interactions.  I wish there was a quick fix for you.  But it looks like you need orthodontic treatment, possibly Invisalign to correct your bite and straighten your teeth. I don't think a veneer would work for you.   Looking at your pictures, it looks like your one upper lateral is pushed in and I suspect sits behind your lower tooth when you close.  Also the gums on that tooth are pulled down lower than the rest of your gum line.  A veneer on this tooth would be very short because it would be low on the top due to your pulled down gum line and short in the bottom edge to clear your lower tooth when you close.  If you were curious what a veneer would look like, you could ask a dentist to do a nice bonding for you. A bonding could be placed without any damage to your tooth, so if you didn't like it, you could ask it to be taken off.  Once you saw what could be achieved, with a quick fix, you might feel more decisive about which option to choose.  Most dentists would charge to do a bonding even if temporary, but I suspect if you decided to go with Invisalign instead, they just might give you partial or full credit toward Invisalign.  My best to you!

 If I understand your chief concern, you want to align your left lateral incisor with the adjacent teeth. It's hard to tell from the photos that you have an underbite,  more photos would help. That said, if you simply want to align the teeth in each arch and not address the underbite, Invisalign may work for you. A single veneer would not be your best option. Particularly if it would be built in an underbite situation.  Your top and bottom teeth could be aligned better, so Invisalign would help to accomplish that. If you want to try to correct the underbite, you should see an orthodontist to evaluate what all your options are.