The full explanation for why John Wick cut off his finger in John Wick: Chapter 3 – Parabellum is something that the writers seem to be reserving for John Wick: Chapter 4. Before the ending of Chapter 3, John Wick finds himself in the presence of the Elder, the head of the High Table. The Elder is willing to forgive John Wick, but only if he pledges loyalty to the High Table for the rest of his life (and kills Winston).
