Heineken, ranked world number two, said the pandemic and accompanying lockdowns which brought the global economy to a halt saw sales by volume fall 8.0 percent for the period.
Heineken gave no revenue figure.
Badly hit by the on-off restrictions on the hospitality sector, Heineken said it aimed to cut personnel costs by 20 percent.
A company spokesman cited by Dutch news agency ANP said job losses could not be ruled out.
“The situation remains very volatile and uncertain. We believe that spikes in the epidemic will continue to have a significant impact in several of our markets in addition to growing recession pressures,” Heineken CEO Dolf van den Brink said in a statement.
When the coronavirus outbreak began, Heineken said it aimed to avoid massive layoffs but in April was forced to scrap forecasts and dividends for this year.
Founded in the 19th century in Amsterdam, Heineken sells more than 300 brands, including its namesake plus others such as Strongbow and Amstel. It employs 85,000 people globally.
Danish rival Carlsberg meanwhile reported a relatively strong three months to September which allowed the world ranked number four brewer to upgrade forecasts for the full year.
The company said third quarter sales were down 7.0 percent but volumes rose 2.4 percent.
“We are happy with our third quarter results and that fact that we were able to grow volume sales by two percent,” Carlsberg boss Cees’t Hart said in a statement. | Agence France-Presse