She represented Romania in her first Olympic appearance, at Munich in 1972. Following her emigration to Canada, Ionesco competed for Canada at two Commonwealth Games (1978 and 1982), the 1979 Pan American Games, and the 1984 Summer Olympic Games in Los Angeles.
Her younger sister Florența competed for Romania in the 1980 and 1984 Summer Olympics.
|1972||Olympic Games||Munich, West Germany||7th||Discus|
|1978||Commonwealth Games||Edmonton, Canada||2nd||Shot Put|
|1979||Pan American Games||San Juan, Puerto Rico||3rd||Shot Put|
|1982||Commonwealth Games||Brisbane, Australia||6th||Shot Put|
|1984||Olympic Games||Los Angeles, United States||12th||Shot Put|
- Carmen Ionesco at World Athletics
- Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill; et al. "Carmen Ionesco". Olympics at Sports-Reference.com. Sports Reference LLC. Archived from the original on 2020-04-18.