However, he did not mince words in rebuking North Korea, saying that Pyongyang should suspend its nuclear weapons program.
Haley added that "all options are on the table" concerning North Korea, but said the country must engage in positive action before the USA would take it seriously. New sanctions could be slapped on North Korea as the Security Council is meeting this Wednesday.
The THAAD missile launchers that were recently acquired by South Korea from the U.S.
Parts of the weapons system arrived in Seoul just as North Korea completed another round of ballistic missile tests by firing four rockets into the Sea of Japan in violation of United Nations Security Council resolutions.
During the call on Tuesday morning, which lasted about 25 minutes, Trump said North Korea's outrageous action was unacceptable and assured Abe that the United States stood by Japan "100 percent" on the issue. They flew on average 1,000 km (620 miles) and reached an altitude of 260 km (160 miles).
Japan's ambassador Nobushige Takamizawa said it was "totally unacceptable" that the missiles had landed off Japan's northwest coast.
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Meanwhile the U.S. has begun deploying a missile defence shield in South Korea.
Mr Wang likened the U.S. and North Korea to trains at risk of collision.
China also used an editorial in the Global Times, a tabloid published by the Communist Party's "People's Daily", to rebuke North Korean leader Kim Jong-un on the THAAD deployment.
"I think that Secretary of State Tillerson is a person who is willing to listen and is a deep communicator", Wang said at his annual news conference in Beijing on Wednesday, on the sidelines of China's parliament.
The decision to deploy THAAD in South Korea was made in July previous year. "We again strongly urge the relevant sides to stop the deployment process and not keep going down the wrong path", he added.
The alternative to China's proposal "would be escalation of tension, and the situation may get out of control", he told The Associated Press and other reporters.
Last month, Abe's visit to Trump's Florida resort was marred by another North Korean missile test. "So, deploying THAAD is clearly a wrong option", he said and warned that the move would not improve South Korea's security. In fact, it may have nothing to do with the PRC government's typically stringent gaming content policies; the boycott is believed to be in retaliation of the U.S and South Korea's installation of an advanced missile defense system bordering North Korea.