In several television interviews today, Haley praised China's involvement in trying to pressure North Korea to cease missile testing and criticised its leader, Kim Jong Un, as unstable and paranoid.
Haley told NBC's "Today Show" that "we are not going to do something unless he gives us reason to do something," such as attacking a US military base or using an intercontinental ballistic missile.
When asked what would happen if North Korea tests another missile or nuclear device, Haley told NBC: "I think then the president steps in and decides what's going to happen."
North Korea conducted two nuclear tests last year alone, which would have improved its knowledge on making nuclear weapons small enough to fit on long-range missiles.
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South Korean officials say there's a chance the country will conduct its sixth nuclear test or its maiden test launch of an ICBM around the founding anniversary of its military tomorrow.
Haley said the US is working with China to pressure North Korea on the missile and nuclear testing and other issues, including the detention over the weekend of a US citizen, bringing to three the number of Americans now being held there.
"What we're dealing with is a leader who is flailing right now and he's trying to show his citizens he has muscle," Haley told "CBS This Morning.