The man, identified as Thura Kyaw, also a US national, had flown from the United States to reunite with his girlfriend after five to some five years apart.
Thalang Police Station were called to the scene, on Don Chom Tao Rd in Tambon Thepkrasattri, at around 9:30pm.
Officers were told that a man remained unconscious after suffering an electric shock.
Police, rescue personnel and Thalang Hospital staff rushed to the scene. Despite CPR efforts, Mr Thura Kyaw was pronounced dead at the hospital.
According to witnesses, including Ms Nok, a friend of the couple, Mr Thura Kyaw had just arrived at the restaurant with his girlfriend in a car. As he exited the vehicle, he slipped on the wet ground from recent rain and accidentally touched an electric pole that had a 220-volt electrical leakage.
Bystanders quickly intervened, pulling him away from the pole and performing CPR until rescuers arrived.
Authorities from the Thalang branch of the Provincial Electricity Authority (PEA Thalang) later inspected the area and confirmed the electrical leakage.
The faulty pole, part of the public lighting system maintained by the Phuket Highways Office, had a live current. Officials temporarily shut off the circuit breaker to prevent further danger.
Ms Nok explained that Mr Thura Kyaw and his girlfriend had planned a long-awaited reunion after years apart. They had been spending time together in Phuket for about a week before the tragic accident.
Local residents expressed concern about public safety, urging authorities to promptly address electrical hazards in tourist areas.
The Phuket Highways District has been notified to investigate and repair the issue.