Despite laying siege to the Metz goal, Marseille had to settle for a single point that left them in fourth place, 11 points behind leaders Paris Saint-Germain.
Until the sending-off, Thomas Delaine had stretched Marseille but all of Metz's efforts were halted by 36-year-old goalkeeper Steve Mandanda, recalled to the team for the first time for two months.
Jemerson was dismissed for a studs-up challenge on Dimitri Payet with half an hour left to play, sparking a frantic finish.
Polish forward Arkadiusz Milik and US international forward Konrad de la Fuente both came close for Marseille without finding the net.
Third-placed Nice host Montpellier in Sunday's later matches.
Neymar scored twice in PSG's 3-2 win against Bordeaux on Saturday and dedicated his goals to Marilia Mendonca, a popular Brazilian singer and Latin Grammy winner who was killed in a plane crash the day before.