It depends upon what model in which you are interested. Yes, there are a few rumors that there might be a new iPhone SE (3rd generation?) in April or sometime this spring.....
The major line of iPhones, though, which will be the iPhone 13 (or some other name if they choose to rename it) is not anticipated to come out until somewhere around September 2021.
The SE 3rd generation, like its predecessors, would be a small and presumably budget-priced phone without some of the predicted features and functions of the iPhone 13 or even those which already exist in the current iPhone 12 series. It also would be released with iOS 14.x, since iOS 15 will not be available until around September 2021, alongside the iPhone 13 series.