Microsoft Paint will be included in version 1903 and Windows 10 for now. The classic Windows Paint application was removed from the Windows 10 Fall Creator’s Update in July 2017. As a replacement Microsoft promoted their Paint 3D app, but for those who wanted the Classic Paint, it would become available from the Microsoft Store. Since then, subsequent builds of Windows 10 continued to provide the Paint application, but Microsoft added a “Product Alert”” button that when pressed stated that “”Paint will soon be moving to the Microsoft store”””
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-not-giving-up-on-classic-windows-paint-yet/