Panesar made his national senior team debut in 2014. The same year, he was part of the Canadian team that won the silver medal at the Youth Olympics in Nanjing, China. He captained the Canadian team at the 2016 Men's Hockey Junior World Cup in Lucknow, India. He was part of the national team that clinched silver at the 2017 Men's Pan American Cup in Lancaster, United States. He was selected for the 2018 World Cup, where he played all four games. In June 2019, he was selected in the Canada squad for the 2019 Pan American Games. They won the silver medal as they lost 5–2 to Argentina in the final.