Answer
Yes, such a transfer may be possible through a third country if a Uruguayan bank is not prepared to work directly with Russian accounts. The underlying issue remains: banks may not wish to accept money arriving directly from Russia.
In this scenario, a third country is used as an intermediary route. Money is first withdrawn or converted outside Russia and then sent on to Uruguay. That does not automatically make the transfer straightforward: the source of the funds must still be explained to the bank.
The key is to preserve a transparent trail. It should be clear where the money came from, why it passed through a particular country, which currency it was exchanged into, and who is sending the final payment. Without this, the intermediary transfer may raise additional questions.