Steven Dick, 37, was Deputy Chef de Mission at the British Embassy in Budapest.
He died Tuesday after contracting Covid-19, the Foreign Office said.
British Foreign Minister Dominic Raab said: “I am desperately saddened by the news of Steven’s death and my heart goes out to his parents Steven and Carol. ”
“Steven was a dedicated diplomat and represented his country with great skill and passion. He will be missed by all who knew and worked with him. “
Dick joined the Foreign Office in 2008 and also worked in British embassies in Riyadh and Kabul, according to his biography on the British government website.
His role as deputy head of mission has made him a key adviser to the British ambassador to Hungary, Iain Lindsay. Dick has also worked in the UK government’s department for digital, culture, media and sports.
“Steven was a very beloved son, grandson and nephew,” said Dick’s parents in a statement to the British press agency PA.
“He was kind, funny and generous. It was always his dream to work for the Foreign & Commonwealth Office and he was very happy to represent our country abroad. ”
On March 25, the United Kingdom recorded more than 8,000 cases of coronavirus and 435 deaths, while Hungary recorded 226 cases and 10 deaths.