Answer
Yes. If Russian databases show a restriction on passport issuance or a ban, applying through a consulate in Uruguay does not circumvent it. A Russian international passport is processed by a Russian consular office under the rules of the country of citizenship, not by Uruguayan authorities.
If you are on a stop list, the consulate will refuse to issue a passport. The same applies when the ban is based on Russian legal grounds, such as military obligations: it is a matter for the Russian authorities, not Uruguay. A local cédula or residence permit cannot override a decision in the national database.
It is important to distinguish between a refusal to schedule an appointment, a request for additional documents, and a formal refusal. If the restriction is known in advance, first clarify its legal status and whether it can be appealed before spending time and money on a consular trip or completing an application form.