The dismantlement has been made as a follow-up to North Korean leader Kim Jong Un's pledge at the June 12 summit with U.S. President Donald Trump to dismantle one of the missile test sites. Notably, the statement didn't directly criticize Trump.
North Korea accused the United States on Thursday of pushing for worldwide sanctions despite goodwill moves by Pyongyang and said progress on denuclearization promises could not be expected if Washington continues to follow an "outdated acting script".
It continued: "Now, the issue in question is that going against the intention of President Trump to advance the DPRK - US relations, some high level officials within the US administration are making baseless allegations against us and making desperate attempts at intensifying the global sanctions and pressure".
"However, the USA responded to our expectation by inciting global sanctions and pressure against the DPRK", it said in a statement carried by KCNA news agency.
But the details of that process remain vague - North Korea did not commit to unilaterally give up its nuclear weapons and the United Nations says its nuclear programme is continuing.
Pyongyang has also stepped up its calls for a formal end to the Korean War, which some analysts believe is meant to be the first step in the North's effort to eventually see all 28,500 USA troops leave the Korean Peninsula.
The North Korean statement followed comments this week by top American diplomats stressing the need for Pyongyang to take additional steps toward denuclearisation.
Earlier this month, U.S. Secretary of State Mike Pompeo warned Russia, China and other countries against any violation of worldwide sanctions on North Korea that could reduce pressure on the North to abandon its nuclear weapons.
US National Security Advisor John Bolton has also weighed in on the issue, saying Sunday that nobody in Trump's administration is "starry-eyed" about the prospect "of North Korea actually denuclearising".
The inspection was supposed to be carried out from Friday until August 17 on the North Korean section of the road running from the border town of Kaesong to Pyongyang.
The North noted that they returned remains of USA soldiers who fought in the Korean War to the US last week.
It has urged Washington to take reciprocal steps including officially declaring an end to the war and dropping sanctions.
South and North Korea technically remain at war as the Korean War ended only with the armistice treaty.
The summit held in Singapore marked the first time Kim Jong-un had met a western leader.