Suvari made appearances in television shows such as Boy Meets World and ER at the age of fifteen and sixteen respectively. In 1999, she starred in the Oscar-winning American Beauty and the popular American Pie. Suvari was nominated for a BAFTA for Best Performance by an Actress in a Supporting Role, for her role in American Beauty.
She followed these movies with roles in Loser (2000), The Musketeer (2001), and Spun (2002). Suvari also became a recurring character in the fourth season of the critically acclaimed HBO serial Six Feet Under in 2004, as lesbian performance poet and artist, Edie. Suvari was nominated for a Blockbuster Entertainment Award for "Favorite Actress - Newcomer (Internet Only)" in 2000 for American Pie.
In 2006, Suvari performed the voice role of Aerith Gainsborough in the Square Enix/Disney video game Kingdom Hearts II and the English-language version of Square Enix's Final Fantasy VII Advent Children.