Whole numbers:formatting numbers

I have a list of numbers. Some of them can be very long like 0.156489789 and some can be simply 2, 3, 4, 5 etc...

I want excel to show them to three decimals only when it needs to.

eg: if i have a 1 i want it to read 1
if I have a 3.2 i want it to read as 3.2
if I have a 5.55 i want it to read 5.55
if I have a 1.01515151515 i want it to read formatted like 1.015

I am currently using the number format #,##0.###. This works fine except when I have a whole number like '1' it reads out as '1.' with a decimal after it.

How can I achieve this to read whole numbers without the decimal and still be able to read out the other 1-3 digits if it needs to?


Thanks in advance