Saudi Arabia will host the third International Nuclear Science Olympiad (INSO 2026) in Jeddah, with around 120 students and specialists from 19 countries expected to participate. The event is scheduled from August 2 to 9, 2026, at King Abdulaziz University, and the opening ceremony on August 3 will be held under the patronage of Prince Saud bin Mishal bin Abdulaziz, Deputy Governor of the Makkah Region. The Olympiad is jointly organized by the Ministry of Education, the King Abdulaziz and His Companions Foundation for Giftedness and Creativity (Mawhiba), and the King Abdullah City for Atomic and Renewable Energy (KACARE). Approved by the International Atomic Energy Agency in 2024, INSO serves as a global platform for students to exchange expertise in nuclear science and its peaceful applications. The event aims to promote safe and peaceful use of nuclear technologies, encourage youth specialization, and inspire innovative solutions. Mawhiba Secretary-General Abdulaziz Al-Kuraidis expressed appreciation for the Kingdom's leadership support and praised the strategic partnerships with the Ministry of Education and KACARE. Saudi Arabia, represented by Mawhiba, has participated in the Olympiad since its inaugural edition in the Philippines in 2024 and the 2025 edition in Malaysia, winning five international awards including one silver and three bronze medals. Hosting the third edition underscores Saudi Arabia's commitment to scientific excellence and its growing prominence in organizing international scientific competitions.