Ruy Leme da Fonseca Filho (born June 9, 1973) is a Brazilian horse rider that competes in Eventing. He won four Pan American Games medals from 1995 to 2015. Fonseca competed in two Summer Olympics, London 2012 - finishing 42nd in individual and 9th in team eventing - and Rio 2016, where Fonseca was eliminated in the jumping qualifiers after his horse refused to jump and threw him off.