Can a Texas landlord withdraw a notice to quit after serving it?

Yes, but with consequences. A Texas landlord who has served a notice to quit can voluntarily withdraw it at any time before filing the eviction action in court, typically by sending a written withdrawal to the tenant. After withdrawal, the landlord cannot proceed on that notice; if the breach continues, the landlord must serve a new notice and start the period over. Strategically, withdrawal is often a poor choice: it signals to the tenant that the landlord lacks resolve, can complicate later eviction attempts, and can be used as evidence of waiver if the same breach is alleged again. The cleaner alternative is to negotiate a written cure agreement that preserves the landlord's right to evict if the tenant defaults again.

Source: Texas landlord-tenant code