Officers were called to the hotel, at the southern end of Kata, at 6:11pm after receiving reports of a man attacking hotel employees.
Police identified the suspect as Reza Bahman Farshi, 44, an Iranian national. Officers from Karon Police attempted to de-escalate the situation, but negotiations with the suspect failed.
After nearly an hour, authorities requested additional support. Pol Lt Thirayut Suksongwan and a police patrol unit tried once more to calm the man down, but when he refused to cooperate, officers deployed a stun gun, subduing him with a single shot.
The suspect sustained minor injuries and received first aid from Karon Municipality rescue workers before being taken into custody for further investigation.
Police are determining whether drugs or other substances played a role in the attack. The Iranian Embassy has been contacted for further action, police said.
Police have not yet disclosed the motive behind the attack or the condition of the injured hotel staff.