Indonesia was the host nation of 2018 Asian Games held in Jakarta and Palembang from 18 August to 2 September 2018. Indonesia competed with 938 athletes, the most in the Games.
Qatar competed at the 2018 Asian Games in Jakarta and Palembang, Indonesia, from 18 August to 2 September 2018. Qatar represented by 20 national sport federations, with a plan of over 250 competitors who will be participating across 30 disciplines and also at the 2018 Asian Para Games.
Nepal competed at the 2018 Asian Games in Jakarta and Palembang, Indonesia, from 18 August to 2 September 2018.
Afghanistan competed at the 2018 Asian Games in Jakarta and Palembang, Indonesia, from 18 August to 2 September 2018. Afghanistan first participated at the Asian Games since the first Games in 1951 Delhi, and have collected five silver and 6 bronze medals until the last event in 2014 Incheon.
Cambodia competed in the 2018 Asian Games in Jakarta and Palembang, Indonesia from 18 August to 2 September 2018. This event marks the 12th Asian Games appearance for Cambodia since making their debut in 1954.
The men's 100 metres competition at the 2018 Asian Games took place on 25 and 26 August 2018 at the Gelora Bung Karno Stadium.
The men's 400 metres competition at the 2018 Asian Games took place on 25 and 26 August 2018 at the Gelora Bung Karno Stadium.
The men's high jump competition at the 2018 Asian Games took place on 25 and 27 August 2018 at the Gelora Bung Karno Stadium.
The men's long jump competition at the 2018 Asian Games took place on 25 and 26 August 2018 at the Gelora Bung Karno Stadium.
The women's 400 metres hurdles competition at the 2018 Asian Games took place on 26 and 27 August 2018 at the Gelora Bung Karno Stadium.
The men's 110 metres hurdles competition at the 2018 Asian Games took place on 27 and 28 August 2018 at the Gelora Bung Karno Stadium, Jakarta, Indonesia.
The women's 800 metres competition at the 2018 Asian Games took place on 27 and 28 August 2018 at the Gelora Bung Karno Stadium.
The men's 800 metres competition at the 2018 Asian Games took place on 27 and 28 August 2018 at the Gelora Bung Karno Stadium, Jakarta, Indonesia.
The women's 100 metres event at the 2018 Asian Games was held at the Gelora Bung Karno Stadium, Jakarta, Indonesia on 25–26 August 2018.
The men's 200 metres competition at the 2018 Asian Games took place on 28 and 29 August 2018 at the Gelora Bung Karno Stadium.
The men's 4 × 100 metres relay competition at the 2018 Asian Games took place on 29 and 30 August 2018 at the Gelora Bung Karno Stadium.
The men's 1500 metres competition at the 2018 Asian Games took place from 29 August 2018 until 30 August 2018 at the Gelora Bung Karno Stadium.
The women's 4 × 100 metres relay competition at the 2018 Asian Games took place on 29 and 30 August 2018 at the Gelora Bung Karno Stadium in Jakarta, Indonesia.
Thailand competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. Since the nation's official debut in 1952, Thai athletes have appeared in every edition of the Summer Olympic Games, with the exception of the 1980 Summer Olympics in Moscow, because of its partial support of the US-led boycott.
Singapore competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. It is the nation's seventeenth appearance at the Summer Olympics since its debut at the 1948 Games. In addition, Singapore was part of the Malaysian team at the 1964 Summer Olympics in Tokyo, but did not attend at the 1980 Summer Olympics in Moscow, because of its support for the United States boycott. The opening ceremony flag-bearers for Singapore are table tennis player Yu Mengyu and shuttler Loh Kean Yew. Diver Jonathan Chan is the flag-bearer for the closing ceremony.
