Gary Barlow, Mark Owen and Howard Donald will also be releasing new music as well as a Greatest Hits album for fans.
The band will take to the road in 2019. They have been performing as a trio since Jason Orange quit in 2014.
Fellow original member Robbie Williams occasionally performs with the group.
“We have a Greatest Hits coming out, we have a few new songs and next year we’re doing a Greatest Hits tour, Barlow told Hits Radio presenter Sarah-Jane Crawford at the first ever Hits Radio Live at the Manchester Arena.
Owen said: “It’s thirty years this year. We’re making a record, we’re always celebrating, we’ve been celebrating for thirty years.
He added: “Somewhere in the performance we’re going to have to throw in a little floss!”