On May 3, 2019 he was named EuroLeague MVP for the month of April. In the third place game of the 2019 EuroLeague Final Four, Campazzo set an all-time record for assists at 15 in a Final Four game. He surpassed Terrell McIntyre's record from 2008.
Campazzo competed for Argentina at the 2012 Summer Olympics. He played for Argentina teams that won gold medals at the 2012 South American Championship and at the 2014 South American Games, silver medals at the 2014 South American Championship, the 2014 FIBA Basketball World Cup, the 2015 FIBA Americas Championship, and a bronze medal at the 2013 FIBA Americas Championship. He competed at his second Olympics for Argentina at the 2016 Summer Olympics. In 2019, he helped Argentina bring home a gold medal from the Pan American tournament in Lima.