Can a girl get pregnant if she had intercourse 3 days after her ovulation day?

Sex and pregnancy: The timing of ovulation is difficult to predict, and sexual intercourse can lead to pregnancy.

Yes: It takes time (days) for the egg to move into position in the Fallopian tube where it may encounter a sperm & become fertilized. When & if it encounters a fertile sperm is somewhat hard to predict, by the sperm swim, the eggs do not.