The current forecast for the decrease in cruise shipping operations in Port Palma de Mallorca (Majorca Island, Spain) is ~60%, equating to ~350 ship calls and ~1 million cruisers.
Port's operator Balearic Ports Authority indicated that there had been massive cancellations until the end of August 2020. As the position of the regional government is that airports and ports should be the last to be reopened, there is no certainty as to when cruise ship activity might resume.
All cruise companies with Mediterranean deployments are affected. For example, Costa Cruises (which suspended operations through the end of May) will depend on authorities in different countries. Liners arriving in Palma in June 2020 is beyond belief, and the same would go for Spain's all cruise ports.
According to Majorca's Chamber of Commerce, the cruise industry will have to wait until there are health safety protocols in place. CLIA ((Cruise Lines Association) acknowledges that health issues come first. All cruise shipping companies will be most probably limiting their vessels' max passenger capacity.
For Coronavirus updates on cruise ship quarantines (infected passengers and crew) and top-pandemic countries (COVID-19 cases and deaths, daily updated statistics) see at CruiseMapper's Norovirus page.