Scarleth Ucelo (born 7 April 2000) is a Guatemalan weightlifter. She represented Guatemala at the 2020 Summer Olympics in Tokyo, Japan. She finished in 13th place in the women's +87 kg event. In 2019, she finished in 5th place in the women's +87 kg event at the Pan American Games held in Lima, Peru. She competed in the women's +87 kg event at the 2021 World Weightlifting Championships held in Tashkent, Uzbekistan.