His brother told AFP news agency he died on Friday following a battle with pneumonia.
GWR paid tribute to Mr Magar, saying he “didn’t let his small size stop him from getting the most out of life”.
Mr Magar was recognised as the world’s smallest man on his 18th birthday in 2010, at a ceremony attended by local and international dignitaries.
“I don’t consider myself to be a small man. I’m a big man. I hope that having this title enables me to prove it and get a proper house for me and my family,” he said at the time.
GWR has two categories for people of short stature – mobile and non-mobile. Filipino Junrey Balawing, who is unable to walk or stand unaided, is the world’s shortest non-mobile man, measuring 59.93cm.
Mr Magar lost his title as the world’s shortest mobile man to fellow Nepalese national Chandra Bahadur Dangi, who measured 54.6cm. However, he regained it following Mr Dangi’s death in 2015.
Mr Magar was first spotted by a travelling salesman when he was 14 and taken to local fairs, where children paid to be photographed next to him.
After gaining recognition from GWR in 2010, he travelled around the world and made television appearances in Europe and the US. He also became an official face of Nepal’s tourism campaign.
Craig Glenday, GWR’s editor-in-chief, said he was “terribly sad” to hear the news of Mr Magar’s death.
“His bright smile was so infectious that he melted the hearts of anyone who met him,” he said.
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We are saddened today to hear of the passing of the world’s shortest man, Khagendra Thapa Magar from Nepal. He was 27 years old. Khagendra, who was born on 14 October 1992, stood at 67.08 cm (2 ft 2.41 in) tall when measured at Fewa City Hospital in Pohkara, Nepal, on the advent of his 18th birthday in 2010. Khagendra was born in the Baglung district of Nepal, the eldest son of Roop Bahadur and Dhan Maya. His father recalled, “He was so tiny when he was born that he could fit in the palm of your hand, and it was very hard to bathe him because he was so small.” According to friends, Khagendra had been struggling recently with heart problems, asthma and pneumonia. “We’re terribly sad to hear the news from Nepal that Khagendra is no longer with us,” said Guinness World Records Editor-in-Chief Craig Glenday, who first met Khagendra during his visit to Italy in 2010. “His bright smile was so infectious that he melted the hearts of anyone who met him. As many people of short stature experience, life can be challenging when you weigh just 6 kg and you don’t fit into world built for the average person. But Khagendra certainly didn’t let his small size stop him from getting the most out of life. It’s been an honour to know him and his family, and a privilege to share his story with the world.” Click the link in our bio for more memories of Khagendra.
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The record for the shortest living mobile man is now held by Edward Hernandez of Colombia, who measures 70.21cm.