Volkswagen group unit Škoda's July sales dropped 4% year on year to 69,700 cars.
Western Europe sales rose 4.8% to 26,500.
Eastern Europe sales slumped 12.4% to around 10,000 with Russia off 21.8% to 6,800.
Central Europe volume fell 0.5% to 9,500.
China was the brand's largest market in July but volume was also down, by 5.5% to 18,000.