Russia has access to the Baltic Sea - in the Russian exclave "Kaliningrad Oblast" there is an important war harbour. Also, Russia has access to the Eastern part of the Gulf of Finland (part of the Baltic Sea), Sankt-Petersburg is actually on the Baltic coast.
What was meant in the question were perhaps "Three Baltic States" - Lithuania, Latvia and Estonia (actually, Lithuania doesn't share a border with Russia). Or maybe Latvia, Estonia and Finland?
Russia, Poland, and Latvia all have borders touching the Baltic Sea. Other Eastern European countries touching the Baltic sea are Estonia and Lithuania. Countries that are considered to be Western European that also touch the Baltic Sea are Germany and Sweden.
The list of countries with the coastline on the Baltic see consists of:Denmark,Germany,Poland,Russia,Lithuania,Latvia,Estonia,Finland,Sweden.
* Baltic Sea * Germany * Czech Republic * Slovakia * Ukraine * Belarus * Lithuania * Russia
Baltic sea
Germany, Denmark, Poland, Russia, Lithuania, Latvia, Estonia, Finland, Sweden.
Latvia, Lithuania, and Estonia
Russia, Poland, and Latvia all have borders touching the Baltic Sea. Other Eastern European countries touching the Baltic sea are Estonia and Lithuania. Countries that are considered to be Western European that also touch the Baltic Sea are Germany and Sweden.
Kaliningrad
Baltic sea : Finland, Denmark, Sweden, Russia, Poland, Estonia, Latvia, and Lituania
The Ukraine, Belarus, Latvia, and Estonia (south to north) form the western border of Russia. Poland and Lithuania border the Baltic Sea port of Kaliningrad, which is physically separated from the rest of Russia.
Kaliningrad
Baltic Countries Denmark, Germany, Poland, Russia, Lithuania, Latvia, Estonia, Finland, Sweden
Countries around the Baltic Sea, such as Germany, Denmark, Estonia, Lithuania, Latvia, Finland, Poland and Western Russia
Finland and Norway
Finland and Norway
The enclave of Kaliningrad
Latvia and Russia