Premature tree leaf fall color occurs for a number of reasons, most all of them associated with stress.  Sometimes the cause is minor and the indicators temporary.  However, when premature color occurs, it's advisable to determine and remedy the cause or ask a certified arborist to assess the tree's health onsite and recommend a course of action.

If you decide to hire an arborist, this information may be useful:

https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional

Learn more here:

https://extension.illinois.edu/blogs/garden-scoop/2017-08-23-early-fall-color 

http://plantclinic.cornell.edu/factsheets/mapledecline.pdf