Missing lateral incisors. Can I get veneers without getting braces first only on my canines to alter their shape? (photos)

You can have porcelain veneers placed on your canines in order to change the shape/size/esthetics of your teeth.  Please do your research and go to a dentist very experienced in cosmetics prior to having any work done.  Matching 2 veneers to the rest of your teeth in the front is not an easy task.  

Hi:
You can definitely get veneers to change the shape of the canines.  You might also be able to reshape the tooth and get bonding as another alternative.
Best,
Dr. Maddahi

You can get veneers treatment without getting braces treatment first but I still recommend bonding treatment to fill the front teeth gap along with cosmetic reshaping. 

Hello,
While you can certainly place veneers on the canines alone, you can also consider cosmetic reshaping of the canines and bonding. Matching single porcelain veneers perfectly often requires involvement of a custom shade at the laboratory. Please consult with a experienced cosmetic dentist near you.
Hope this helps,
Dr. Mazaheri