Tom Westley has been ruled out of action for 12 weeks after undergoing finger surgery in Leeds.
Westley, who made his England Test debut in the summer but was overlooked for the Ashes tour, sustained the injury while fielding for England Lions against a Queensland Select in Brisbane last week.
He will now be out of action until at least March, ruling him out of the Lions' tour of West Indies that gets underway in early 2018.
The remainder of the Lions squad are currently in Perth, at the Western Australia Cricket Association's facilities at Murdoch University, for the second part of their training camp, with the focus switching to white-ball cricket.
They play a 50-over match against a WA selection on Wednesday, followed by a T20 game the following day.
Then they play three T20 matches against Perth Scorchers, as part of the hosts' preparations for the Big Bash on December 11, 13 and 15 - the first two of which will be the first cricket fixtures played at the new 55,000-capacity Perth Stadium, where the senior England team are due to play an ODI next January.