They will join the hundreds of people expected to attend the Refugee Action Collective Illawarra run rally and march outside Wollongong Town Hall on Palm Sunday.

Refugee Council of Australia chief executive officer Paul Power will also address the Say Yes to Refugees rally on April 14.

With the coming Federal election, the rally starting at 12.30pm will call for the next government to adopt a humane refugee policy that will bring all those asylum seekers on Manus and Nauru to safety in Australia.

RAC spokesperson Stephen Spencer said 12 asylum seekers have died on both Manus and Nauru.

"The passing of the Medevac Bill by Parliament (to provide for the evacuation to Australia of asylum seekers requiring urgent medical treatment) is a step forward and we call for its proper implementation. Yet the government is now saying it will repeal the Bill if re-elected," he said.

"Most of the 1000 people remaining in offshore detention on Manus Island and Nauru, have been assessed as genuine refugees but are still enduring desperate circumstances on Manus and Nauru."

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To highlight his point Mr Spencer pointed to a UNHCR report which found that 88 percent of those on Manus were suffering mental illness.

"The present government is evidently prepared to let refugees languish in detention on Manus and Nauru indefinitely," he said.

"We want a government which stops trying to demonise these innocent people and also stops trying to shift responsibility for them to other countries.

"The camps must be closed and the refugees brought to Australia, before further suffering and loss of life occur."