A couple of other minor points of clarification, first I thin kthe rule in most dioceses is that Deacons must be married for a period of time (in our diocese it is 6 years) before they are ordained. The intent is to ensure there is evidence to see that the Deacon aspirant comes form a stable home life. It also ensures aspirants do not marry quickly to get in “under the wire”.
Second, it’s not terribly unusual for Deacons to be able to remarry after rodination, but it is an exception. That exception is if they have small children where the presence of a second parent is pretty crucial to the raising of the children. You most often see this if a wife passes away at an earlier age.