Tomašević won the bronze medal at EuroBasket 1999 in France. Over nine tournament games, he averaged 7.2 points, 6.0 rebounds and one assist per game. Tomašević played at the 2000 Summer Olympics in Sydney, Australia, where he averaged 10.3 points, 6.9 rebounds and 1.9 assists per game over seven tournament games. He was a member of the FR Yugoslavia team that won the gold medal at EuroBasket 2001 in Turkey. It was his third EuroBasket gold medal. Over six tournament games, he averaged 6.7 points, 5.0 rebounds and 2.5 assists per game. Tomašević won the back-to-back gold medal at the 2002 FIBA World Championship in Indianapolis, Indiana, U.S. Over nine tournament games, he averaged 6.2 points, 5.1 rebounds and 1.9 assists per game.