Slepov missed his third test over a 12-month period on September 30, with the 33-year-old subsequently faced with receiving a two-year suspension.

However, as reported by Russian state-run news agency TASS, he was able to prove he was in hospital with "poisoning" instead of at the location on the Anti-Doping Administration and Management System (ADAMS), which athletes use to enter whereabouts details and other information.

"RUSADA has completed consideration of a possible missed test by biathlete Alexei Slepov on September 30, 2020," a statement from the organisation said.

"After examining the explanations and medical documents provided by Alexei, RUSADA decided not to consider this case as a violation of the rules for the availability of an athlete for testing."

Last season Slepov competed in the International Biathlon Union Cup, the second-tier competition in the sport. 

Doping has been a prominent issue in biathlon, particularly among Russian athletes.

In February, Evgeny Ustyugov was banned for two years and was stripped of his Sochi 2014 Olympic gold medal due to alleged offences dating back to 2013, while Alexander Loginov had his room raided by Italian police. 

Russia had 10 positive tests by biathletes between 2011 and 2015 that were covered up, according to the McLaren Report.

The Russian Biathlon Union (RBU) was demoted to provisional membership of the IBU in December 2017 in response to the country's doping scandal and owed the IBU money.

In September, RBU President Viktor Maigurov claimed most of the remaining €350,000 (£313,000/$395,000) debt had been paid off.