Jones made the announcement Thursday afternoon on the duo's web site. Jones' girlfriend and singing partner, Meghan Linsey, announced Sept. 23 that the duo would cancel a handful of shows because the 31-year-old was unable to perform, but didn't specify why. Linsey began playing Steel Magnolia's scheduled tour dates alone Sunday.
The duo released its debut album earlier this year and is nominated for the vocal duo of the year award at the Country Music Association Awards in November.
Jones and Linsey met in a karaoke bar in Nashville's Printers Alley and teamed to win the CMT singing contest "Can You Duet" in 2009, earning a contract with Big Machine Records.
(Copyright 2011 by The Associated Press. All Rights Reserved.)