North and South Korean officials held high-level negotiations at the border truce village of Panmunjom on Monday to discuss the summit.
North Korean leader Kim Jong-un and South Korean President Moon Jae-in met in April and agreed to have another summit in autumn, this time in the North's capital, Pyongyang.
Kim has a held a flurry of diplomatic summits with the leaders of South Korea, China, and the United States this year.
Moon and Kim also had a surprise meeting at the border in May, making Moon the only South Korean leader to have met a North Korean leader twice.
The North has been heavily sanctioned over its pursuit of nuclear weapons and ballistic missiles but Kim and US President Donald Trump agreed at their landmark summit in Singapore in June to work towards the denuclearisation of the Korean peninsula.
North Korea has denounced US-led efforts to maintain sanctions despite what Pyongyang says are goodwill gestures, including halting its weapons testing and returning the remains of US troops killed in the 1950-1953 Korean War.
