"Captain Gary Ballance is set to miss several Royal London One-Day Cup fixtures after the Club, this week, granted him some time away from the game due to personal reasons," Yorkshire said.
"We ask that his privacy be respected during this time."
The 28-year-old, who has 23 test caps for England, missed Yorkshire's most recent County Championship game against Surrey at the Oval, with Joe Root taking over the captaincy on that occasion.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Steven Patterson was named captain for Friday's Royal London Cup opener against Durham at Chester-Le-Street.
(Reporting by Alan Baldwin, editing by Christian Radnedge)
