yesterday evening i visited a friend who grows hapily two fig trees that i gave him before 3 years ago.
the trees has grown very well , they are big and tall! but one tree has some yellowish leaves that looks like they were burned then after that those leaves start to fall. it doesn't look to me like a fig rust. so i have taken pictures so   may i can find someone to help me identifying this kind of disease.
  I will appreciate any info.

How old is the tree?  Is the tree potted or in-ground?  Are the damaged leaves from the bottom, middle or top portion of the tree?  

Kassoum,
It looks like a nutrient deficiency, but it could also just be old leaves.
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Good Luck.

when i see brown leaf edges, i think over fertilization. that would fit with the salt comments above.

Add water.

Hot, dry weather with a lot of wind

Looks stressed, the burned edges are an indicator for salt buildup. If this is an inground tree it might be a little tough to remedy, but for a containerized plant flush the soil out by watering until clear water flows out the bottom of the pot .

thank you for all your comments ! i think that had helped a lot.
i will explain to my friend all that, i am sure he will get benefit