Tory MP Tim Loughton was detained and deported by an East African country with close ties to China.
The former minister, who has been sanctioned by the Chinese state, believes his "intimidating" detention and removal from Djibouti was a "direct consequence" of his criticism of the Chinese regime.
Loughton has raised his treatment in the East African country with deputy Foreign Secretary Andrew Mitchell, and has written to the Djibouti ambassador via the Foreign Office in protest at the incident, which he described at "outrageous".
The Foreign Office is said to be seeking an explanation from the Djiboutis over his treatment.
Tory MP Tim Loughton was detained and deported by an East African country with close ties to China
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Loughton travelled to Djibouti on April 8 for a 24-hour visit, which included a plan to meet with the British ambassador.
But he was detained for more than seven hours at the airport and was prevented from entering the country. He was then removed on the next available flight.
Louhgton, along with six other parliamentarians, was sanctioned by China more than three years ago.
He has been critical of the "industrial scale" of human rights abuses conducted by China against the Uighurs, Tibetans and Hong Kongers.
China has invested billions of dollars into Djibouti, including investing in a new stadium, hospital and $1 billion (£791 million) space port.
Beijing has also built a naval base in the country, with 2,000 troops stationed there. It also holds more than $1.4 billion of Djibouti’s debt, 45 per cent of its GDP.
Last month it was revealed that Loughton, along with three other MPs and one peer, had his parliamentary emails hacked by China.
And on Friday, two men were charged with spying for China, one of which was a former Parliamentary researcher.
Loughton told the Telegraph that his treatment in Djibouti could set a precedent for other China-backed states, calling for the West to "wake up" to the "“malign and all encompassing tentacles of the Chinese regime at home and abroad".
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He explained: "As soon as I revealed I was a British MP, and my passport was checked, things turned decidedly frosty."
When he was escorted to wait for the next plane out of the country, Loughton said he was provided with no explanation.
He said: "They gave me no reason. I kept saying: ‘Why?’ and they could not tell me.
"In short, it was a highly intimidating and very lonely experience in a very strange country."