Cambodian Prime Minister Hun Manet made the announcement in a Facebook post late on August 7, along with a letter he said it had been sent to the Norwegian Nobel Committee, praising Trump's involvement as an example of "the US president's special achievements in reducing tensions in some unstable areas".
"This timely intervention has prevented a potentially destructive conflict, playing an important role in preventing major losses in life and paving the way for peace," the Cambodian Prime Minister wrote in the letter.

President Donald Trump's July 26 call to the leaders of both Thailand and Cambodia has contributed to breaking the deadlock in the recent effort to end the fierce fighting between the two neighboring countries in recent history.
That led to a ceasefire negotiated in Malaysia on July 28. On August 7, Thailand and Cambodia signed a comprehensive ceasefire agreement after a special joint Border Committee meeting in Malaysia.
A total of 43 people were killed and more than 300,000 people were displaced in the five-day conflict, which began with small-scale artillery fire and quickly escalated into heavy artillery and artillery fire. Thailand has even deployed F-16 fighter jets for airstrikes.
Trump's nomination for the Nobel Peace Prize was predicted after Cambodian Deputy Prime Minister Sun Chantol announced the plan last week, and thanked Trump for imposing a 19% tax on Cambodian imports into the US - down sharply from the 49% he had previously threatened.
In June, Pakistan also announced that it would nominate Mr. Trump for the Nobel Peace Prize for his contributions to helping resolve the conflict with India.
Last month, Israeli Prime Minister Benjamin Netanyahu announced that he had nominated President Trump for the Nobel Peace Prize.