The listing has had negative comments regarding kitchen so the seller has decided to update it. Seller wants no showings during this time. Which is best terminate or withdraw listing?

This is a complex question without much supporting info... so hard to really give one definitive answer. Are you asking what's best for the client? Or for you? What's best in the short term? Or the long term. If the house has been listed for a while and the Days on Market have stacked up, might be better to terminate it or let it expire and start with a fresh listing after the kitchen remodel. If the listing is pretty new--less than 30 days for example--then withdrawing may be the best option all around.