Can composite veneer be removed, reversed to the way it was and be left alone without damage and additional treatment? (Photos)

Yes the dentist should be able to remove these composite bondings without injury to your underlyng teeth..Then you can decide if you want something else done.

Hi:If the original teeth were not touched when the composite veneers were placed, then they can be removed without damage to your teeth.Best,Dr. Maddahi

Yes you can have these removed , but one has to be very careful not damaging the tooth under neath. Porcelain veneers may be a better option for you. Discuss with your dentist. 

It is very difficult to promise a patient NO alteration to a tooth that will receive a veneer. What can happen in these cases is an undesired esthetic result. I'm wondering if you had any type of temporary veneers placed so you could see what the shape of the final veneers would be? In looking at the photos you've shown, the shape of your two front teeth is very rectangular, but in order to fill the space around your peg laterals the veneers were made triangular in shape. My recommendation would have been to treat the four front teeth for a more pleasing overall appearance. After discussions with you prior to treatment about your desired esthetic outcome, I would have my dental laboratory technician create a mold for a trial smile. There would be some adjustment to the shape of the underlying teeth to allow the ceramist to give you the desired result, and then your temporary veneers would allow you to see and feel what you could expect. We can then make changes to the shape of the temporaries to your satisfaction, and the ceramist would duplicate those changes in your final veneers.To answer your initial question, I have sometimes been able to use a laser to dissolve the bonding between the veneer and tooth with little to no change to the underlying tooth. Otherwise, very careful separation of the veneer from the tooth may be possible by other means.Good luck!

Thank you for your question and it is a very relevant one. Although composite is often called minimally invasive, when it is bonded on properly it adheres really strongly to the underlying enamel. 
The better the work the dentist has done, the harder it is to remove.
However, there is a process to remove it if your dentist is very careful and takes their time. Additionaly your dentist can use an etching process intermittently to make sure all the remaining composite has come off.
When your dentist adjusted your composite, another feature that is inherent to these types of materials became apparent to you: They normally are not very densely packed and often have small air bubbles either directly from the packet or as a function of your dentist applying it to your teeth, layer by layer.
Hope my answer has been helpful -
Kind regards - Thomas Dey