Root has been based at the Ageas Bowl with the rest of England’s 30-man training group ahead of the first Test against Windies which starts at that same venue on July 8.
However, the England and Wales Cricket Board confirmed on Tuesday that Root would leave the group on Wednesday to be with his wife, Carrie, who is expecting their second child.
Root, 29, will therefore miss England’s three-day intra-squad warm-up match which begins on Wednesday and the first Test against West Indies.
In Root’s absence, vice-captain Ben Stokes will captain his country for the first time.
Root will commence a seven-day self-isolation period at home once he and his family leave hospital and rejoin his England team-mates ahead of the second Test at Old Trafford on July 13.
The ECB have also confirmed that wicketkeeper-batsman Jos Buttler will play in the series opener despite speculation over his place in the side and act as Stokes’ vice-captain.
Earlier this week, Stokes insisted he would not alter his style of play if he was confirmed as England captain for the first Test of the summer.
‘I hope that I always try to set the example in terms of attitude and commitment,’ the 29-year-old said.
‘If I am in charge that’s not going to change the way that I go about things. In terms of how I want to influence the game, I try to have a positive effect with the ball or bat in my hand.
‘No matter what I do in terms of choosing what to do in a situation, it will always be the positive route.’
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