The Junior Wallabies will have to wait until 2021 to defend their Oceania U20s crown.
The annual championship was officially cancelled on Friday after being postponed earlier in the year due to the coronavirus pandemic.
Originally scheduled to be played on the Gold Coast from May 27 until June 6, the four-team tournament that involves Australia, New Zealand, Fiji and Japan was postponed last month.
On Friday morning, Oceania Rugby released a statement confirming the competition's cancellation due to international travel and government public health restrictions.
The news follows World Rugby's cancellations of the World Rugby U20 Championships, set to be played in July.
Friday's announcement means there are currently no scheduled Tests for the Junior Wallabies this season.
It is still hoped that Australia's representative teams will be able to set up a series of standalone Tests against New Zealand should a trans-Tasman bubble open up later in 2020.