He highlighted that North Korea can use their submarines and launch missiles anywhere in the world so this is a great concern.
North Korea said the missile it had tested on Sunday was a "newly developed ballistic rocket" capable of carrying a large nuclear warhead.
South Korea wants to reopen communications with North Korea, officials said yesterday.
South Korean President Moon Jae-in said Wednesday there was a "high possibility" of conflict with North Korea, which is pressing ahead with nuclear and missile programs it says it needs to counter US aggression.
South Korea's Yonhap News notes that Moon has promised to increase South Korea's defense budget from the current 2.4 percent of GDP to 3 percent.
Moon, a liberal, favors a softer approach to North Korea than his conservative predecessors and has offered to visit Pyongyang if the circumstances are right.
"The Unification Ministry has considered options on this internally but nothing has been decided yet", said Lee.
The missile, which reached an altitude of roughly 1,300 miles and landed in the sea between Japan and the Korean Peninsula more than 430 miles from its launch site, signals that North Korea's weapons program may be advancing faster than previously believed.
"We all have to send a sign to North Korea, and that is "No more".
Meanwhile, the top USA military officer in the Pacific described North Korea's recent military actions as "a recipe for a disaster" and warned against a sense of complacency in the face of increasing tensions on the Korean Peninsula.
Moon made the comments after stating that he wanted to reopen the channels of communication with the North.
Haley said the Security Council is going to send a strong and unified message to North Korea that "the global community wants to support you but as long as you test, and as long as you continue your nuclear program, you are on an island by yourself". "We don't have it done yet", Haley said.
North Korean diplomat Ju Yong-choi told the UN Conference on Disarmament on Tuesday, "The DPRK will bolster its self-defence capabilities as long as the United States continues its hostile policies towards the DPRK and imposes nuclear threats and makes blackmail".
North Korea has carried out two atomic tests and dozens of missile launches since the beginning of past year, in its quest to develop a missile capable of delivering a nuclear warhead to the continental US. The U.S. has said North Korea must abandon its nuclear weapons program entirely; Moon said, "North Korea must change its attitude of insisting on pressing ahead with its arms development before dialogue is possible", as Reuters puts it.
US President Donald Trump's administration has called for a halt to Pyongyang's provocations and warned that the "era of strategic patience" with North Korea is over. Pyongyang hailed as a success the launch that was aimed at testing its missiles' ability to carry a heavy warhead, a measure it says it needs to counter United States hostility.