The 3rd of Cheshvan is the yahrtzeit (anniversary of the passing) of the famed Chassidic master Rabbi Israel of Ruzhin (1797-1850), known as "The Holy Ruzhiner."
Rabbi Israel was a great-grandson of Rabbi DovBer of Mezeritch; a close friendship existed between the Ruzhiner Rebbe and the 3rd Chabad Rebbe, Rabbi Menachem Mendel of Lubavitch.
Link: three stories