Pot Might be Too Compact For Lime Plant

https://wool-wiki.win/index.php/All_the_things_You_Need_To_Start_off_Your_Own_Indoor_Backyard_garden,_As_outlined_by_Professionals

My lime plant is step by step shedding its leaves. The brand new leaves are smaller and round, not like normal lime leaves. Is that this on account of an excessive amount fertiliser?