The 'Honey Bee' singer revealed that The Voice's demanding schedule has led him to re-evaluate his future on the series.
"I don't know how much longer I'm even going to do it," Shelton admitted to Access Hollywood.
He further explained that the Voice producers' decision to air seasons both in the fall and the spring has left him little time to work on other projects.
"It's their decision [for us to leave], in that they're the ones choosing to do back-to-back seasons," he explained. "They really leave us no other option. As far as Christina and Adam and Cee Lo and I - if we want to tour, there's not a chance of that doing back-to-back seasons. That's not acceptable to me."
He continued: "At some point, I've got to go, 'You know what - this has been awesome. It's changed my life, but it's not my life… I've got to get back to what I really do, and that's country music'."
Shelton made those comments on the same day as Christina Aguilera hinted that she may take a hiatus from The Voice after the current season to focus on music.
"I'll probably be back. I just need to do my thing for a minute then I can come back and be that much better of a coach," Aguilera said.
The Voice continues Monday at 8/7c on NBC.
> The Voice: Blind auditions night three recap
Watch Blake Shelton's 'Honey Bee' music video below: