YOU SAID:
my dad left me at the age 3
INTO JAPANESE
私の父は3歳で私を去りました
BACK INTO ENGLISH
My father left me at the age of 3
INTO JAPANESE
父は3歳で私を去りました
BACK INTO ENGLISH
Father left me at the age of three
INTO JAPANESE
父は3歳で私を去りました
BACK INTO ENGLISH
Father left me at the age of three
That didn't even make that much sense in English.