not technically although a parent of a teenager can sure have depression and anxiety 13 years later. after three years (or 13) it not considered post-partum depression but it is depression (and/or anxiety) nonetheless. this person needs medical help. yes. a person suffering from postpartum depression can get recurrence of depression. whether treated or untreated when it occurred. counselling and if required antidepressant medications help.
if left untreated can postpartum depression occur after 3 years? . this person i am asking about has a history of depression and anxiety issues.