Alex Hales is serving a 21-day suspension for using a recreational drug, a Guardian report claimed Friday.
Hales, who was named last week in England's preliminary World Cup squad has been sanctioned under the England and Wales Cricket Board's disciplinary policy for a second time.
A spokesman for Hales also confirmed the suspension.
Hales will still be involved with England's training camp in Cardiff this weekend, with England's first ODI game of the summer scheduled against Ireland in Dublin on May 3.
"He will be joining the squad in preparation for next week's games and will be available for selection," the spokesman said.
"Whilst the issue is not cricket related, Hales accepted that it was right that he was suspended."
An ECB spokesperson said: "We have a duty of confidentiality, therefore we are unable to provide any further comment."
Nottinghamshire issued a statement last week confirming Hales had "made himself unavailable for selection for personal reasons", and "no timetable has been set for his return to action".
Last year, Hales was suspended and fined by the ECB following his involvement with Ben Stokes in an incident outside a Bristol nightclub during September 2017.
The drugs violation is believed to have been detected after Hales underwent a hair follicle test, which all professional cricketers have at the start and finish of every season.
For a first drugs offence, which is treated as a health and welfare issue, players are offered advice and support with only the county director of cricket being notified.
A second violation can invoke a three-week ban and a five per cent fine of the player's annual salary, at which point the player's county is informed, as well as the ECB and PCA chief executives.