Am I allowed to stay in Thailand with multiple visa exemption entries as long as I have necessary documentation?

Based on the travel pattern you describe, nothing stands out as problematic under the new formalised guidelines or the Visa exemption system itself. Your stays have been short, your total time spent in Thailand is under six weeks, you have no overstays, no visa or border runs aimed at prolonging a continuous stay, and your travel clearly fits within ordinary tourism. Three visa exemption entries in a year, with brief stays and time spent outside Thailand in between, is still well within what is normally accepted. As long as you can show an onward ticket within the initial 60 days, accommodation, and sufficient funds if asked, you should be fine. There is no formal rule limiting the number of visa exemption entries per calendar year, and calendar years themselves are not decisive. What matters is your total time spent in Thailand within a rolling cycle and whether your pattern still resembles genuine tourism. On the facts you’ve outlined, it does. What people often refer to is not a “fast track” service, but a so called safe entry service. This is a legal service where your travel history is pre-checked in advance, and if accepted you’ll get escorted through the process. It does not bypass immigration law, but it does provide a level of certainty based on prior screening.