Authorities have confirmed the 63-year-old died at the Grand Millennium Auckland yesterday.
It is not known how long he had been in the mandatory 14-day isolation for, before he died yesterday.
Managed Isolation and Quarantine deputy chief Andrew Milne said in a statement: "[We are] saddened to confirm that a 63-year-old male, who arrived from the Pacific and is staying at the Grand Millennium Auckland, has sadly passed away today.
"The returnee displayed no Covid-19-related symptoms during their previous daily health checks."