for do loop and checking directory

I need to run a loop with a command but as it loops through the command I need it to sleep for a bit if there is more than 3 trans logs in the db directory, not sure how to put in the sleep in this case.

for example, if I use a for loop such as this

for i in `cat file-input.txt`;do ./command $i;done

I need to do a  ---  echo `ls  /data/csdb/log* | wc -l`  

and only continue if the count is 3 or less,

so I need to put in a if statement but not sure how here.

Thanks,

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