2003 FIFA Women's World Cup thumb|alt=Hamm during the third-place match against Canada at the 2003 FIFA Women's World Cup|Hamm during the third-place match against Canada at the 2003 FIFA Women's World Cup Originally scheduled for China, the 2003 FIFA Women's World Cup was moved to the United States due to the SARS outbreak. Hamm was named to the U.S. roster in August, and stated that it would be her final World Cup appearance. During the team's first group stage match, Hamm's three assists helped the U.S. to a 3–1 win over Sweden. She scored twice against Nigeria and served the assist for the team's third goal to lead the U.S. to a 5–0 win and qualification for the quarter-finals with one match to play. The U.S. faced North Korea in their final group stage match and dominated 3–0. Hamm and a number of others were rested for the game by head coach April Heinrichs; this was the first World Cup match Hamm had missed in her career. The U.S. faced Norway in the quarter-finals; Although the U.S. won 1–0, Hamm was fouled throughout the match as Norway played with physicality to counter the U.S. team. One of Norway's 24 fouls resulted in a penalty kick for Hamm which was saved by the Norwegian goalkeeper. After the U.S. was defeated 3–0 by Germany in the semi-finals, the team defeated Canada 3–1 to secure a third-place finish.
2003 FIFA Women's World Cup thumb|alt=Hamm during the third-place match against Canada at the 2003 FIFA Women's World Cup|Hamm during the third-place match against Canada at the 2003 FIFA Women's World Cup Originally scheduled for China, the 2003 FIFA Women's World Cup was moved to the United States due to the SARS outbreak. Hamm was named to the U.S. roster in August, and stated that it would be her final World Cup appearance. During the team's first group stage match, Hamm's three assists helped the U.S. to a 3–1 win over Sweden. She scored twice against Nigeria and served the assist for the team's third goal to lead the U.S. to a 5–0 win and qualification for the quarter-finals with one match to play. The U.S. faced North Korea in their final group stage match and dominated 3–0. Hamm and a number of others were rested for the game by head coach April Heinrichs; this was the first World Cup match Hamm had missed in her career. The U.S. faced Norway in the quarter-finals; Although the U.S. won 1–0, .Hamm was fouled throughout the match as Norway played with physicality to counter the U.S team. One of Norway's 24 fouls resulted in a penalty kick for Hamm which was saved by the Norwegian goalkeeper. After the U.S. was defeated 3–0 by Germany in the semi-finals, the team defeated Canada 3–1 to secure a third-place finish.