Sudanese man Abdul-Aziz Adam has been held in Manus Island since 2013, but he said the conditions for refugees and asylum seekers in 2019 were the worst he'd experienced.
He said access to mental health and medical services for refugees and asylum seekers on the island were "next to nothing".
Amnesty International and the Refugee Council of Australia released a in November which found that since the regional processing centre on Manus Island's Lombrum Naval Base closed in October 2017, and were experiencing increasingly poor mental and physical health.
Amnesty International Australia Refugee Coordinator Graham Thom said the "situation had continued to deteriorate" since the report was released.
"We have continued to monitor the situation speaking both with refugees on the island and those that have recently visited Manus and Port Moresby," he said.
"The reports we are receiving regarding self-harm and suicide attempts, coupled with the lack of mental health care, are alarming."
It comes after the federal government on Monday announced that it would set up which would oversee transfers of asylum seekers from regional processing centres to Australia.
Amnesty International's Refugee Policy Expert Dr Graham Thom (AAP). Source: AAP
Over the past year, the federal government has halved the number of mental health staff available to refugees and people seeking asylum and terminated trauma counselling services, according to Amnesty.
Suicide attempts among refugees on the island have become a Catholic leader in Papua New Guinea said in January.
Mr Adam, , said he was losing hope of ever leaving the island and that the federal government must urgently find a solution.
An image from the Manus facility. Source: Abdul-Aziz Adam Source: Abdul-Aziz Adam
"Death is more merciful," he said.
"Finding us a solution would not encourage people smugglers to resume their activity, the Australian government has praised its success in stopping the boats and they have returned some to Indonesia.
“I have been in Manus since 2013, they brought us here against our will. We didn’t choose to come here. They discriminated against us simply for seeking asylum.
"We were taking to the island against our will, they made some exceptions but we didn't volunteer to be taken away from Australia after arriving."
The Amnesty report found that it was "extremely difficult" for refugees to access healthcare in PNG and that there was just one clinic to serve the more than 600 refugees and asylum seekers remaining on Manus Island, as well as the local hospital which is severely understaffed, which had no interpreters and often had no ambulance available.
Mr Adam said many refugees and asylum seekers were willing to be relocated to the US.
“We are sick of waiting, we don’t want to come to Australia anymore, we don’t want the government to allow us to enter Australia, we just want a solution," he said.
"We are prisoners and happy to go to any third country that will welcome us. The American deal is on hold, so many people are on hold. less than 100 people have only been taken but many more are willing to go to the US."
Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14, Suicide Call Back Service on 1300 659 467 and Kids Helpline on 1800 55 1800 (up to age 25). More information about mental health is available at .
