Action at the event had been due to take place from which was March 8 to 11.

The national governing body has also rescheduled the women’s and men’s Summer Slam - Fully Loaded Softball.

The three events were due to form seven days of competition, from March 5 to 14, at Blacktown International Sportspark, with the action being broadcast live on Fox Sports Australia and Kayo.

The new dates for the Summer Slam - Fully Loaded Softball, a shortened and quicker version of softball, will be April 9 to 11 for the women’s event and April 23 to 25 for the men’s event.

The fourth edition of the Australia Pacific Cup, which is sanctioned by the World Baseball and Softball Confederation (WSBC), was expected to be a test before the Tokyo 2020 Olympic Games.

Last year, four of six qualified teams for the Olympics played in the international tournament, including hosts Australia, Italy, Japan and Mexico.

New Zealand and Chinese Taipei completed the field of teams in an event Japan won without incurring a single defeat.

"We’re obviously bitterly disappointed to be cancelling the Australia Pacific Cup, which is usually an important event for the Travelodge Aussie Spirit preparations, particularly in an Olympic year," said Softball Australia chief executive David Pryles.

"A number of countries qualified for Tokyo had expressed an interest in competing at Blacktown again in 2021, however, the restrictions still in place made it incredibly difficult to secure the necessary accommodation and travel options for quarantine requirements.

"We’ll of course work towards resuming the Australia Pacific Cup in 2022."