Canberra’s political journalists are threatening to boycott Prime Minister Malcolm Turnbull's visit to Nauru, unless local government reverses its ban on ABC staff attending.

The ABC was due to send a cameraman, a photographer and a journalist to cover the Pacific Islands Forum, but in wake of the ban, the federal press gallery decided if one cannot go, none will go.

Mr Turnbull said the Nauruan government’s decision is regrettable, but the local authorities have the right to decide who is allowed in.