The bodies of the men, aged 57, 36 and 32, were recovered Saturday evening near Lech, a few hours after the wife of one of the skiers reported them missing.
The victims suffered multiple injuries despite being equipped with avalanche protection gear that deployed airbags.
Police said the four friends had apparently skied onto a trail that was closed. Police in Vorarlberg, Austria's westernmost province, had to call off the search for another missing German skier in the group, age 28, because of heavy snow and risk of avalanches. They were located via cellphone tracking.
The accident took place at an altitude of 1,800 metres (6,000 feet) as the pair from the Morillon ski resort "were working on an avalanche prevention programme", one of the experts said. Ski patrollers are in charge of preventing potential dangers to skiers, notably by triggering controlled avalanches with powerful explosive charges.
The avalanche brings to at least 24 the number of weather-related deaths reported in parts of Europe this month.
Snow set in again in the northern Alps yesterday night after authorities had done their best to clear some of it.
All parks, public gardens, play areas and cemeteries were closed in the Austrian city of Salzburg because of the danger of trees falling under the weight of snow, according to Sky News.
Three people were injured after an avalanche hit the Swiss resort of Schwaegalp on Thursday.