Twenty countries gathered 1,400 students at the 3rd International Junior Mathematics Olympiad (IJMO) held in Malaysia, Kuala Lumpur from July 26 to 30, 2019. 

IJMO competition was held at the  University of Malaya  on July 27, 2019.  The 20 countries and territories were: Bahrain, Bulgaria ,Cambodia, China, Hong Kong,Iran, India, Indonesia, Laos, Maldives,Malaysia, Mongolia, Myanmar, the Philippines, Singapore, Thailand, Taiwan, Vietnam,USA and Uzbekistan.