Mark F. Sennello, age 20 of Stratford passed away suddenly on Friday, December 21, 2018 at St. Vincent's Medical Center .  Mark was born in Bridgeport on May 3, 1998 and was a student of the C.E.S. Raise Program at Sacred Heart University .  Mark was a joy to all that knew him, he had an infectious smile and love for everyone he knew.  He was an avid Pittsburgh Steelers, Mets and Georgia Bulldogs fan, enjoyed bowling, driving go-carts and attending school plays. He loved being the Bunnell HS mascot and proudly wearing the Bulldog costume. He was also a master at Lego kits.  Mark will be sadly missed by all, especially his parents, John and Christine Kasey of Stratford and his grandparents; William Sennello, Sr. and his wife Kay of Stratford and Lawrence and Nancy Campbell of Milford .  He is also survived by his aunts and uncles William Sennello, Jr. of Bethel,  Elizabeth (Terry) Krasselt of Evans, GA and Kim Volkens (Augie) of Milford &  was also survived by Frederick and Mary Beth Sennello of Bridgeport and many cousins.  A Mass of Christian Burial will be celebrated on Saturday, December 29, 2018 at 10:00 am at St. Mark Roman Catholic Church, Stratford .  Interment will be held privately at a later date.  Friends may greet the family on Friday, December 28, 2018 from 4 to 8 pm at the Dennis & D'Arcy – Abriola & Kelemen Funeral Home, 2611 Main Street , Stratford .  In lieu of flowers, donations in Mark's name may be made to Autism Speaks at www.autismspeaks.org