I'm 5'3", I weight 190lbs, and my BMI is 34.8. Am I a candidate for bariatric surgery?

Yes! You are a candidate for bariatric surgery. You will need to discuss with your surgeon which is the best option for you given your medical history, etc but usually a restrictive procedure like a gastric sleeve works best for patients with a low BMI ike yourself. 

Hello
Thank you so much for your question and congratulation on taking the decision to become healthier.
Yes, with the information you have provides you can consider The sleeve gastrectomy, which reduces the size of the stomach is probably an excellent option because the 70% to 80% of the stomach is removed and the part that produce Ghrelin which is a hormone that makes you feel hungry. Paired with healthy diet and exercise you should have a successful procedure. 
To qualify for weight loss surgery, the American Society for Metabolic and Bariatric Surgery recommends you meet one of the following:
1- BMI ≥ 40, or more than 100 pounds overweight.
2- BMI ≥35 and at least one or more obesity-related co-morbidities such as type II diabetes (T2DM), hypertension, sleep apnea and other respiratory disorders, non-alcoholic fatty liver disease, osteoarthritis, lipid abnormalities, gastrointestinal disorders, or heart disease.
3- Inability to achieve a healthy weight loss sustained for a period of time with prior weight loss efforts.
Remember that the surgery limits the quantity of the food intake but doesn't help with the quality of what you eat. 
Have a consultation with a bariatric surgeon this will allow you to discuss about the different procedures in details. Many factors should be considered when deciding for a bariatric surgery, is needed to check your current health status with lab work and in a consultation you can accomplish this.  Don't be discouraged and continue searching the best option to improve your health.
Good luck in this journey,