Prime Minister Scott Morrison has scrutinized Queensland authorities for not allowing a couple stuck in hotel quarantine, to visit a dying relative.

Mark Kilian and Anneli Gericke are stuck in isolation in Sydney after travelling from the US to visit Mr Kilian's dying father in Queensland.

A last-minute rejection from Queensland Health following successful appeals to Border Force and NSW Health exemptions prompted Mr Morrison to criticise Queenslands' authorities saying he is disappointed that they could not resolve the issue.