All three Baltic states are disappearing due to declining demography, which is much bigger threat to them than Russia is.
No evidence given. In total, the population of Estonia increased by 0.2 percent in 2017. Net migration has been positive in Estonia for three years in a row, Statistics Estonia said.https://news.postimees.ee/4378179/estonian-population-grows-by-3-070-in-2017
Also. positive migration noted in Lithuania in December 2017 http://www.lrt.lt/naujienos/lietuvoje/4/199722/lietuva-nebenyksta-gruodi-imigravo-daugiau-nei-emigravo