Dear Gurubabu03,
As per the rules, the employee is on leave on the 11th and 13th, and the festival falls in between. Therefore, the festival is counted as part of his leave. "Leave ordinarily begins from the date on which leave as such is actually availed of and ends on the day preceding the date on which duty is resumed." So, there is no question of granting him payment for three days.
Ashutosh
HR (Gen.)