In the meantime, the push to isolate North Korea continues, including in Manila.
Bonnie Glaser, from the Centre for Strategic and International Studies, described the resolution as a win for China because "Beijing avoided additional sanctions on Chinese banks, entities that aid North Korea for the time being".
"We will, under no circumstances, put the nukes and ballistic rockets on the negotiating table", Ri said, adding Pyongyang would "teach the United States a severe lesson" if it used military force against North Korea.
Duterte's statement came amid the standoff between the United States and North Korea over the Korean peninsula.
Tillerson also said that the United States has not made any decisions on how to respond to Russian President Vladimir Putin ordering the USA to reduce its diplomatic staff in the country by 755.
"We'll know it when we see it", he said in Manila.
By imposing sanctions America will only "hasten self-destruction", the statement says, adding that North Korea will 'will not hesitate to use to any last resort'.
The US, which has long maintained that China has not done enough to rein in North Korea, negotiated with China for a month on the new resolution before putting it to the Security Council. Concerns were heightened late last month when tests of an intercontinental ballistic missile indicated Pyongyang may be within a year or two of obtaining the technology to reach the USA with nuclear missiles.
He nevertheless held out the prospect of U.S. envoys at some point sitting down with Pyongyang's isolated regime and avoiding the escalating threat of war.
Tillerson did not meet with North Korea's envoy, Ri Yong Ho.
According to a statement from Russia's foreign ministry, top diplomat Sergey Lavrov met with his North Korean counterpart at the forum.More news: BBC accidentally airs Anna Paquin's naked breasts during news broadcast
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The two leaders also welcomed the U.N. Security Council resolution that unanimously passed 15-0.
Thornton further stated that Tillerson would on Sunday ask the 27-member forum of the Association of East Asian Nations, taking place in the Philippines, to consider expelling North Korea from the group.
Tillerson, who was scheduled to attend a gala dinner Sunday, skipped it. Ri did not. South Korean Foreign Minister Kang Kyung Wha expressed hope the two could talk.
Kang told CNN the meeting was "unplanned" and only lasted a "couple of minutes".
In a telephone call requested by Seoul, Trump and South Korean President Moon Jae-in committed jointly to "fully implement all relevant resolutions and to urge the worldwide community to do so as well", the White House said.
Duterte who now holds the chair of ASEAN told Ri: "We would be good dialogue partners".
"Just completed call with President Moon (Jae-in) of South Korea".
Chinese Foreign Minister Wang Yi urged "the North Korean side to calmly handle the resolutions".
"The best signal that North Korea could send that they are prepared to talk would be to stop these missile launches", Mr Tillerson said.
He said Washington would not "specify a specific number of days or weeks" before deciding North Korea had indeed halted its tests.
But the Trump administration has said it is open to negotiations once North Korea halts its illegal ballistic missile and nuclear programs.
"Sanctions are necessary but in no way the ultimate goal".
"It's quite clear in terms of there being no daylight between the worldwide community as to the expectation that North Korea will take steps to achieve all of my objectives, which is a denuclearised Korean peninsula", he told reporters on Monday.