Jon Lewis, the England bowler, has flown home to attend to his wife, who is experiencing complications in the latter stages of pregnancy, and will be replaced by Stuart Broad.
"We fully understand Jon's need to be with his wife at this time and we are grateful to the Technical Committee for approving our request for a replacement player," David Graveney, England's chairman of selectors, said.
"Stuart Broad performed well with the Academy squad in Australia and on England 'A's recent tour of Bangladesh and I am sure he will be thrilled to be joining up with the squad in the Caribbean."
Lewis played in the warm-ups for England in the early stages of the World Cup last month, but hasn't figured in the group matches. He was one of six players fined for staying out late drinking following England's six-wicket defeat by New Zealand in their opening Group C match in St Lucia. And Broad, the young Leicestershire fast bowler so highly regarded by England's management, has been in good form for England A during their tour of Bangladesh.
Broad made his one-day debut against Pakistan last summer.