Not if you want to keep it. Some choose to keep the stump to reduce the overall cost of the project, especially if the tree is big and they aren’t bothered by the sight of a tree stump in their garden. However, keep in mind that tree stumps can be breeding grounds for pests like termites and that the root system can continue to live on below the ground. It might be better for you and your garden in the long run to consider stump grinding along with tree removal at the same time (and likely for a bundle discount).