The Arsenal man's Monaco residency visa, which allowed him to defer his military duty, meant he couldn't be at Monday's training as he's only permitted to be in Korea for 60 days
The Arsenal striker was the only member of Korea's 18-man squad for the Olympics who was absent from Monday's session in Gyeonggi Province as the team begins to gear up for the event.
Park's absence is a result of his decision to postpone his compulsory military duty after obtaining a Monaco residency visa, meaning he can only remain in Korea for 60 days per year. The 26-year-old has already spent time in Korea this year following the conclusion of the Premier League season.
The former national team skipper is currently in Japan, where he will train on his own until Saturday when he'll fly to Korea.
The Korean side are due to take on New Zealand in a friendly in Seoul on July 14, before flying out to England a day later.
Park is one of three over-age members in the Korean Olympic squad, along with goalkeeper Jung Sung-Ryong and defender Kim Chang-Soo.