How long into a relationship with narcissist does it take for the devaluation and discard process to start?

There is no fixed timeline for when the devaluation and discard process begins in a relationship with a narcissist. It can happen quickly, sometimes within the first few weeks or months, or it can take longer, sometimes years. The narcissist may initially idolize and love-bomb their partner, creating an intense connection that makes it hard for the partner to see the manipulation and control underneath. Over time, the narcissist's true nature begins to emerge, and the cycle of devaluation and discard can begin.