Links to some of Forsythia cultivars names. https://homeguides.sfgate.com/varieties-small-forsythia-bushes-30816.html

Another cultivar in the Forsythia group. https://www.alamy.com/stock-photo-winter-forsythia-forsythia-x-intermedia-close-up-of-leaf-growing-in-87950454.html

Without flowers, these leaves to my eyes they look similar to a type of Forsythia? According to sources Forsythia is deciduous or semi evergreen. Flowers are needed for a confirmed ID. Woody ornamental plants depending on their blooming cycle (spring or summer), pruning at the wrong time will affecting the flower buds setting. Also according to sources, Forsythia do not need yearly pruning but about 3 or 4 years. And pruning is done right after flowering. I suggest you should hold off pruning and let yours shrub flower. When it blooms and you still don’t know, please make new post with photo of flowers. Again, I’m only speculating for now. Check out these links for some cultivars in the group. Best wishes! https://upload.wikimedia.org/wikipedia/commons/2/22/Forsythia_suspensa1.jpg