Generally, teachers should aim to correct and provide feedback on assignments in a timely manner to support student learning and progress. If there is a legitimate reason for needing to delete an assignment before correcting it, it would be advisable for the teacher to communicate with the students and explain the situation.
It is important for teachers to prioritize the best interests of their students and ensure that their actions align with promoting fairness, transparency, and effective teaching practices. Deleting assignments without due consideration may hinder the learning process and erode trust between students and teachers.