Ms Ardern has continued to push New Zealand's offer to accept 150 refugees and asylum seekers from Australia's offshore detention centres since her first face-to-face meeting with her Australian counterpart in Sydney a week ago.
The U.N. Human Rights Committee said on Thursday Australia should bring its migration laws into line with global standards.
Ms Ardern said the unfolding standoff on Manus Island between refugees and Papua New Guinea's immigration officials was not acceptable.
"We made the offer because we saw a great need. They destroyed the rubbish bins where we have been collecting water too", said Behrouz Boochani, a Kurdish journalist from Iran who has been detained for more than four years.
Manus provincial police commander Chief Inspector David Yapu said in a statement that he "will need some clear directives on our next course of action" since the remainder refused to leave voluntarily.
New Zealand Prime Minister Jacinda Ardern has said she will again discuss the stand-off on Manus Island with Malcolm Turnbull when the two leaders meet at the East Asia Summit in the Philippines this week.
But Ms Adern's criticism of Australia's handling of the refugee crisis on the island - which she has described as unacceptable - has prompted a warning from New Zealand's opposition for her to tread carefully.
Government frontbencher Matt Canavan criticised the genuineness of the offer. No matter what label you put on it there is absolute need and there is harm being done, ' she said on Sunday.
Now there are more than 400 refugees who have barricaded themselves in the mothballed Manus Island detention centre fearing they'll be attacked by locals if they're moved by Papua New Guinean authorities to alternative accommodation.
"I see the human face of this issue".
It is thought that a group of around 400 men - the majority of whom have refugee status - are now refusing to leave the facility, in defiance of Australian orders that they are relocated from the camp.
Earlier on Monday two Australian politicians spoke out against New Zealand's offer. There remains a significant Australian Border Force presence on Manus Island, and Australian officials have the ultimate authority on critical issues such as medical transfers.