From Robert Chenard's "Marriages of St. Joseph's Catholic Church Old Town Maine (1860-1960)":
CARON, Adele, 83 yrs., died 06 Nov 1915, widow of Joseph LEBEL
There is no listing for Joseph's death, and no listing of their marriage.However, under the listing for their son Sifroid's marriage, it shows Joseph and Adele as from Canada.Evidently they were married there, possibly Quebec, or even New Brunswick.
You might want to see if you can access records from Ste.Mary's (it might be Ste.Anne's) in Bradley, ME, which is right next door to Old Town.I understand that it was built about 10-15 years after St. Jos.'s, and that the American French families from the area tended to go there. Some of this family's records might be there, including Joseph's death record.