The veteran five-time Grand Slam winner, who has struggled with injury since returning from a doping ban in 2017, showed glimpses of her old ruthless self to dispatch Dart in just 63 minutes.
The 36-year-old said she had suffered a pectoral muscle injury in her third-round win over Julia Goerges and "can't serve at all".
Sharapova was back on Roland Garros' main stage for the first time in three years.
Former world number one Maria Sharapova has won her first title since May 2015.
Maria Sharapova swatted aside Swiss qualifier Stefanie Voegele 6-3 6-1 in just over an hour at the Tianjin Open on Friday to reach her second semi-final since returning from a 15-month doping ban.
Maria Sharapova's stop-start comeback from a 15-month doping ban takes her to the Chinese city of Tianjin this week.
Maria Sharapova again had to dig deep as she defeated fellow Russian Ekaterina Makarova in three sets in the second round of the China Open on Tuesday.
Maria Sharapova muses on her long, lopsided rivalry with Serena Williams in a new autobiography released on Tuesday.
From Maria Sharapova helping design her latest little black dress to Alexander Zverev being reluctant to pull down his tube socks.
Five times Grand Slam Champion Maria Sharapova has withdrawn from Stanford’s bank of the West Classic before her scheduled second-round match.
Maria Sharapova withdrew from Wimbledon on Saturday after failing to recover from a thigh injury, dealing another blow to the superstar's bid
Maria Sharapova's hopes of a dream return from doping exile to a third French Open.