The two teams were scheduled to meet in Queenstown on Sunday.
But a Covid-19 outbreak in Victoria this week, and a lockdown announced on Thursday, meant that was no longer possible after the New Zealand government extended their pause on quarantine-free travel from the state.
The Rebels had flown to Sydney on Wednesday, in the hope of then transferring to Queenstown.
But New Zealand's Covid-19 Response Minister Chris Hipkins said the team were covered by the travel pause because they were in Melbourne when it came into affect on Tuesday night.