All able-bodied men are required to serve in the military for around two years in South Korea, which is technically still at war with the North, but Son received an exemption for leading the country to gold at the 2018 Asian Games.
The £70 million Spurs star will now complete his mandatory military service while the Premier League remains suspended due to the coronavirus outbreak, and will undertake a shortened version of the usual tough boot camp.
Son is currently in self-quarantine in line with tightened entry rules due to the COVID-19 pandemic, but he will still face a tough regime in the Marine Corps which will include discipline education, combat drills and chemical, biological, radiological and nuclear exercises.
A video of military training posted on Tuesday by the Military Manpower Administration showed a group of soldiers undergoing chemical, biological, radiation and nuclear training (CBRN).
