• fehlen: something is missing. Bei diesem Puzzle fehlen zwei Teile. "Two pieces are missing from this puzzle." Ihm fehlt ein Bein. "One of his legs is missing." Du fehlst mir. "I miss you."
• verfehlen: to fail to hit a target. Zwei seiner Pfeile haben das Ziel verfehlt. "Two of his arrows missed the target."
• verpassen: to fail to take advantage of (a mode of transport or an event): Du hast das Mittagessen verpasst, weil du den Zug verpasst hast. "You missed lunch because you missed the train."

Thanks; added now.

vermissen is to miss someone who has gone away (“miss you! - miss you too!” kind of thing).

Not for missing a target or missing a bus.