Answer:
The fig tree was always representative of the Jewish nation in scripture and in prophecy.
Jesus warned the religious leaders of Israel many times that their fate would be like that of the fig tree if they did not stop pretending to be religious and gain a true faith in who God was.
Matthew 3:7-10 But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come? Bring forth therefore fruits meet for repentance: And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham. And now also the axe is laid unto the root of the trees: therefore every tree which bringeth not forth good fruit is hewn down, and cast into the fire.
The leaves represented a sign of something happening but since there was no fruit it was really a façade:
Matthew 23:27 Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men’s bones, and of all uncleanness.