Norwegian Cruise Line, Oceania Cruises and Regent Seven Seas Cruises have cancelled all cruises due to depart in October.
The move was confirmed by parent Norwegian Cruise Line Holdings on Wednesday (29 July).
Starting next month, NCCL has pledged to provide an update at the end of each month on the status of its upcoming sailings, including any suspensions and potential extensions to its operational pause.
Guests booked on cancelled Norwegian Cruise Line, Oceania Cruises or Regent Seven Seas Cruises sailings have been advised to contact their agent, if they booked through the trade.
NCCL also provided an update on Wednesday on its Healthy Sail Panel partnership with Royal Caribbean Group to develop "enhanced cruise health and safety standards" to address the challenges posed by the coronavirus crisis.
The panel comprises experts in public health, infectious disease, biosecurity, hospitality and maritime operations, and is tasked with collaboratively developing recommendations for cruise lines to advance their public health response to Covid-19, as well as improving safety and ensuring they are ready for the safe resumption of operations.
NCCL added in a statement it would continue to work with the US Centers for Disease Control and Prevention, the federal government and global public health authorities "to take all necessary measures to protect guests, crew and communities visited".