If anyone receives an increment for only 3 months and their wages exceed Rs. 15,000, we will first need to determine in which month their salary increased. For instance, if the increase occurred in a middle month like May, then the individual will remain under ESI coverage as they have already made their ESI contribution for April. Starting from May, ESI deductions will be made from their salary based on the full wages received, not just limited to Rs. 15,000.