Police said through Twitter early Tuesday that the couple had been arrested and will make an appearance later in the day at the Finch Avenue courthouse.
Parsi, 32, disappeared on June 9, after he left a soccer game in the Teston Road and Highway 400 area. He drove away in his 2012 black Dodge Ram pick-up truck and was found dead, days later, in a Woolner Ave. apartment in Toronto.
Chouart, 27, of Gatineau, Que., and Marshall, 36, a former resident of Saint John, had been fugitives ever since. They have been charged with first-degree murder.
Det. Sgt. Michael Patterson held a news conference on Monday releasing video footage of the suspects for the second time in recent weeks, and urged the pair to come forward.
"There's only one way to end this properly and that is by turning yourself in," he said, directly addressing Chouart and Marshall. "Get yourself a lawyer, take their advice, and come in and talk to me."
It was not immediately clear early Tuesday if the pair took that advice, or if they were located and apprehended by police.