52 yrs old 3 months post SMAS facelift. What can be done to fix the abnormal corner of my mouth? (Photo)

Thank you for your question and for attaching photos. It appears you need a revision of your face lift. It is hard to tell from the photos, but something certainly needs to be corrected. You should follow-up with your surgeon and talk about options. If you have lost confidence in your surgeon and want to seek a second opinion, you should locate a board certified plastic surgeon who is an ASAPS member in your area. Best of luck.