Celebrity news website TMZ.com cited a source as saying that Bieber had decided to cancel because he was "just over it."
Pop singer Justin Bieber on Monday cancelled the remainder of his Purpose world tour citing "unforeseen circumstances" but gave no specific reasons.
@justinbieber everything will be ok my brother the Next Tour will be stronger than ever I know whats going on so im here in your corner— Malikai (@MALIKAI) July 24, 2017
The cancellation will affect 14 dates in North America and Asia through October 10.
Ticket holders will get refunds.
Ticketmaster are currently working with the venues Justin Bieber was due to perform at, to be able to offer refunds for the tickets.— Bieber Daily (@BieberDailySite) July 25, 2017
"Justin loves his fans and hates to disappoint them," his tour publicist said in a statement.
However, after careful consideration, he has decided he will not be performing any further dates."
Bieber, 23, made no comments on his social media platforms.
Celebrity news website TMZ.com cited a source as saying Bieber had decided to cancel because he was "just over it."
Justin Bieber's response to the cancellation. pic.twitter.com/rEmPAkuvki— JDBVotingHelp (@JDBVoteHelp) July 25, 2017
His mostly young female fan base, who call themselves "Beliebers," expressed disappointment but many were concerned that the Canadian singer might be sick and offered their support.
"THANK U JUSTIN FOR PURPOSE TOUR. You have my biggest respect. We still love you so so much," said another fan, Nadine, tweeting from Austria.
Bieber was photographed on the weekend out hiking near Los Angeles with a young woman and appeared to be in good shape.
Bieber started the tour in support of his Purpose album in March 2016 and has performed more than 150 shows across Europe, Africa, South America, Australia and parts of Asia.
The tour has grossed more than $256 million, according to figures from music tour trade publication Pollstar.
The cancellation comes a few days after the singer was banned from performing in China due to bad behaviour, Beijing's Municipal Bureau of Culture said.
The state office said the singer needed to improve his conduct to become a singer "truly loved" by the public, without specifying what behaviour had caused offence.
Justin Bieber banned from China for "bad behavior."— ian bremmer (@ianbremmer) July 21, 2017
Who said censorship was all bad? pic.twitter.com/qm1PTxzhH7
Bieber has had run-ins with the law in several countries and has become notorious for a string of indiscretions and scandals in recent years.
He also shed the clean-cut image that made him a heartthrob among his fan base when he broke into the music scene on YouTube in 2008 as a 14 year old.