Flows at the Mallnow measuring point on the German-Polish border fell to an hourly volume of around 370,000 kWh.
The reason for the drop in flows was not specified.
Russian gas exporter Gazprom did not respond to requests for information.
Gazprom reserves additional capacity
The supply of Russian gas to Europe is closely linked to the levels of gas stored by Gazprom.
In mid-December 2021, the company began extracting gas from its underground facilities in central Russia.
Gazprom is reserving additional gas capacity at auction for delivery via Ukraine and to Germany.
But for December 2021 deliveries, the company has not reserved any additional supply via Yamal.