Tree is loosing leaves

Thank you for sending the picture. I would like a picture of the whole tree, its age. It appears to be viral, possibly carried by mites.
https://extension.umn.edu/yard-and-garden-insects/insect-and-mite-galls

I do not know the age of the tree. Under 10 years?

Thank you for writing back and for the photograph. I believe this is mite galls.
It could be Chestnut gall wasps http://www.misin.msu.edu/facts/detail/?project=misin&id=342&cname=Asian%20chestnut%20gall%20wasp

http://www.centerforagroforestry.org/pubs/chestnut/v11n4/v11n4.pdf

I suggest that you ask a reputable arborist to diagnose this condition. Identification and removal is critical if this is the Chestnut gall wasp
https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional

Alternatively, you could ask for help from the Dakota County Extention office https://local.extension.umn.edu/local/dakota

Thanks What kind of tree is this? Is It harmful for dogs to be eating the fallen leaves? This tree is in Eagan. Will the tree survive?

I know that the tree is in Dakota County that is why I included that extension office as an option.
The tree is a Horse Chestnut. https://www.minnesotawildflowers.info/tree/horse-chestnut