FORMULA - Conditional Formatting 'good' values with 3 decimal places NOT round, trunc

Hello team - I am a noob and would love some help with a formula It will be used to determine which cells to format, under Conditional Formatting Rule..
Problem:
1. I have received a column of data in rows [General format with no specific number format].
2. My task is to approve the data based on set requirements.
3. The only requirement is for this data to consist of 3 decimal places.
example:
1.221
1.189
1.22
1.24
1.254
1.269
Desired Result:
1.221
1.189
1.22
1.24
1.254
1.269
Any help would be greatly appreciated

Thanks for your reply
Unfortunately it did not work for me :/
See result Screenshot 2021-04-29 121751.png

Hi, can anybody help me with a formula?
I've attached a sample sheet which shows what outcome I'm hoping to achieve.
Basically, all numbers need to be 3 decimal places or more, to comply and be formatted a particular way (green)
If not, they do not comply and need to be formatted a different way (red).
Any help with this would be greatly appreciated
Rowan

Thanks for testing the example sheet
Yes, I agree the formula works for that however, for some reason, the formula is not working on my raw data :/
Would you mind trying the attached sheet?
Thanks in advance!
Rowan

If x = 1.24000531974683, MOD(x*1000,10) = 0.00531974683 <> 0.

If the OP's data were text, the best test would be =MID(A1,FIND(".",A1)+3,1)<>"". If the OP's data is numeric, then only fractional values which would be 0 on 1/1000 place AND ALL lower magnitude decimal places would be .0, .25, .5 and .75. ALL OTHER fractional parts with 0 in the 1/1000 place have nonzero values in lower magnitude decimal places.

What you probably meant was =INT(MOD(A1*1000,10)).

Clarification: presumably 1.234 would have exactly 3 decimal places while 1.2345 would not; however, if an entry appeared as 1.23, should it be considered the same as 1.230? If 1.25 and 1.250 should be considered different values and only the latter having exactly 3 decimal places, then you can't convert these from text to numeric.

You could define a name like x referring to the formula ={1;2;3;4;5;6;7;8;9}. Then change conditional formatting formulas to use x rather than the literal array. Here's an example.