Myanmar's leader Aung San Suu Kyi is "not feeling well" and has pulled out of delivering a keynote speech in Sydney on Tuesday.

Key points: Lowy Institute Lecture was set to be Suu Kyi's only public arrangement in Australia

Lowy Institute Lecture was set to be Suu Kyi's only public arrangement in Australia Suu Kyi facing criticism over plight of Myanmar's Rohingya Muslims

Suu Kyi facing criticism over plight of Myanmar's Rohingya Muslims ABC understands Turnbull and Suu Kyi discussed matter in Canberra meeting

Her appearance, which was being hosted by the Lowy Institute, was set to be Ms Suu Kyi's only public speaking arrangement while in Australia for the ASEAN summit.

She was also expected to take questions from the audience.

The event was likely to attract protests, similar to those seen at the weekend, over the plight of Rohingya Muslims in Myanmar.

Hundreds of thousands of Rohingyas are stranded in shocking conditions in Bangladesh after fleeing violence and destruction of their homes in Myanmar's Rakhine state.

Throughout her stay, Myanmar's State Counsellor has come under heavy public and private criticism over the issue.

"This afternoon, the Lowy Institute was informed by the Myanmar Embassy that the State Counsellor will no longer be able to participate in this event as she is not feeling well. The event is now cancelled," the Lowy Institute said in a statement on Monday.

Ms Suu Kyi was given full honours on a visit to Canberra on Monday, where she held private talks with Prime Minister Malcolm Turnbull.

The ABC understands the two leaders discussed the ongoing Rohingya refugee crisis.

Mr Turnbull encouraged Ms Suu Kyi to reach a resolution so the refugees could return to their homes.

He also made it clear Australia would be willing to keep aid money flowing to both Myanmar and Bangladesh to help resolve the emergency.

Opposition Leader Bill Shorten also raised the plight of the Rohingya Muslims with Ms Suu Kyi at a meeting in Canberra with shadow foreign minister Penny Wong.

The ABC understands Labor discussed concerns about the events that have occurred in the Rakhine State.