Suni Lee and Simone Biles fell on the balance beam during their routines Monday morning, costing them a medal in the event they were hoping to get gold for.As Lee was doing her flips on the beam, she landed, wobbled and then overcompensated for a lean, the commentators said. She then fell with the beam in between her legs and fell off onto the mat. Biles was doing a flip when she landed to one side, leaned and then fell off onto the mat.Several other competitors also fell on the balance beam, with multiple wobbles during the event.Wearing a blue-and-white leotard featuring over 5,000 crystals, Biles was more than halfway through her set when she couldn't quite keep her balance. She hopped off the beam and onto the mat while thousands inside a packed Bercy Arena let out an audible “ohhh.”Biles received a score of 13.100, tied with Lee for fifth. It is the first time since 2000 that an American isn't on the podium in this event.There was an extended wait for her score to post. At one point, Biles rolled her eyes in seeming annoyance knowing she wasn't going to finish on the medal stand.Alice D'Amato of Italy took the gold with a score of 14.366. Zhou Yaqin of China earned silver with a 14.100, just ahead of bronze medalist Manila Esposito of Italy. Lee will still leave Paris with three medals just months after she was bedridden while trying to navigate a pair of chronic kidney-related diseases.While Lee's Olympics are over, Biles is also in the floor final later Monday, an event where she's never lost a major international competition, including a gold in Rio do Janeiro eight years ago.There is plenty of history on the line for Biles in what could be the last competition of her career. Biles has 10 medals in her Olympic career, including seven golds. A medal in the floor final would tie her with Czechoslovakia's Vera Caslavska for the second-most medals by a female gymnast in Olympic history, trailing only former Soviet Union great Larisa Latynina's 18.Biles has stayed relatively quiet on what lies ahead for her beyond the Paris Games, though she did nudge the door open a little for a possible return when the Olympics shift to Los Angeles.“Never say never,” Biles said after claiming her second Olympic vault title on Saturday. “Next Olympics are at home. So you just never know. I am getting really old.”