No. A style can contain mymbering or bullets at the begining, but nothing at the end.
Depending on exactly what it is your are trying to achieve, you could put in a three column table with a symbol in the first and last narrow columns leaving the wide centre column for text.
But I cannot be more specific because I cannot for the life of me guess what you are trying to achive doping this. Why can't you just type the symbols at the start and end of typing the text?
Or you could possibly use Find and Replace. For example, you could find a Stop+return and replace it with symbol+stop+return.
Regards: tf1