In the two previous installments, Calvin's son is named Cody; in this one, his name is Jalen.
The level of liquid in Calvin's glass while in the bar changes between shots.
It is revealed that Jalen is 14 years old, but this movie premiered 13 years, 7 months, and 3 days after Barbershop (2002), which concludes with Calvin's wife handing him their crying newborn, Jalen.