Even before West Indies had secured the series 1-0 after draws in the first two Tests, commentators were questioning whether Root would want to continue as captain after five years in the role.
But Root himself was adamant about his position following their 10-wicket defeat.
“I think I’ve made it quite clear how I feel about this team,” he said.
“I’m very passionate. I feel I’ve got the support of the men behind me to take the team forward. That’s not changed at all.”
Earlier, former England bowler Steve Harmison suggested Root should step down.
“For his own sanity he needs to have a long think about what he does with his future,” Harmison said during the TV match commentary.
Although one of the world’s best batters, with a Test average of nearly 50, Root has rarely looked a natural leader and has earned a reputation as an unimaginative captain.
Harmison said that for all the talk of Root’s tactical nous in the field, or lack of it, he was hardly to blame for England’s frequent struggles with the bat.
“It’s not his fault we keep crumbling under pressure and lose 10 wickets in a session,” he said.
The Caribbean series loss against a lowly-ranked West Indies team comes on the heels of a 4-0 drubbing by Australia in the Ashes.