| Mário Stiebler Dunlop | |
| Fullname: | Mário Stiebler Dunlop |
| Height: | 1.90 m |
| Teamnumber: | 7 |
| Nationalyears: | 1967–1968, 1977 |
| Birth Place: | Rio de Janeiro, Brazil |
Mário Stiebler Dunlop (born 14 January 1946) is a Brazilian former volleyball player who competed in the 1968 Summer Olympics in Mexico City, Mexico. He played on the team that won the silver medal at the 1967 Pan American Games in Winnipeg, Canada. He was born in Rio de Janeiro, Brazil.[1]