All three Nashville Predators players not under contract for 2018-19 will not return to the team, according to general manager David Poile.
Hartnell, 36, had 13 goals and 11 assists this season. The 16-year veteran will contemplate retirement.
"I'll take some time away to think about it," Hartnell told the Tennessean. "These last couple months, just wondering if I still have it, if I could still skate. I thought I played pretty solid, but your heart's got to be there too with it, and that passion. I feel like it's there."
Emelin had one goal and eight assists in 76 games.
Poile also acknowledged that the team will discuss a contract extension with defenseman Ryan Ellis, who will be entering the final season of a five-year deal. Ellis, 27, has previously said he wants to finish his career with the Predators.
Information from The Associated Press was used in this report.