Other concerns included "a substantial amount of critical evidence" of doping in Russia and "the uncertainty relating to the attendance of the athletes", the ISU said.
Russian biathlon officials voluntarily gave up their rights to host a World Cup round in March and the world junior championships, due to start late February.
It was "impossible" to hold the events in the circumstances, the Russian Biathlon Union said.
The International Biathlon Union welcomed the move.
"This is a first important step by the Russian Biathlon Union to show to the IBU and to the world of sport that the current situation is taken very seriously," the IBU said in a statement.
"This will now allow the international biathlon family to focus on biathlon during these events."
Russia had previously lost the world bobsled and skeleton championships in the fallout from McLaren's report, which alleged more than 1000 athletes, including Olympic medalists, had benefited from a state-backed plan to cover up drug use.