At the 2003 World Aquatics Championships in Barcelona, Delaroli finished 18th in the 50-metre freestyle, 24th in the 100-metre freestyle, 14th in the 4 × 100-metre freestyle relay, and 14th in the 4 × 100-metre medley.
At the 2003 Pan American Games, in Santo Domingo, she won the silver medal in the 50-metre freestyle, and bronze in the 4 × 100-metre freestyle. She also finished in 4th place in the 100-metre freestyle and in the 4 × 100-metre medley.