Of course not! Belarus is not a part of Russia, it's a sovereign country and there are no bans. Russia is the main partner of Belarus' exports and the EU is the second largest market. Nowadays, Belarus successfully trades with GB, Netherlands, Germany etc.
Don't worry about this. Belarus has subsidiaries from its different companies all over the world so it does not have problems. Even more, its export to Russia raised significantly, like milk and milk products, because other, especially EU countries, don't export in there. So, go ahead!