It may be that the tree is not getting enough water; leaves turning yellow and falling is symptomatic of that. It could also be a sign of worse things. We suggest you review this page: http://afghanag.ucdavis.edu/a_horticulture/fruits-trees/figs-1/manfruitnswfiggrowingext.pdf for possible conditions. This is a California cooperative extension/university page. TO find the coop ext service nearest you, click here and find your state: http://www.almanac.com/content/cooperative-extension-services
It may be that the tree is not getting enough water; leaves turning yellow and falling is symptomatic of that. It could also be a sign of worse things. We suggest you review this page: http://afghanag.ucdavis.edu/a_horticulture/fruits-trees/figs-1/manfruitnswfiggrowingext.pdf for possible conditions. This is a California cooperative extension/university page. TO find the coop ext service nearest you, click here and find your state: http://www.almanac.com/content/cooperative-extension-services
We hope this helps!