MySql Replication Query

Hi,

This is my first in this forum...so please take it easy if i made any mistake...thanks

So here is my case::

In our production system, One MASTER database and Two SLAVE databases...now i want to use one of my slave database as BACKUP database...need to mention that sometimes I delete some data from master database(company requirement) which replicate to two slave databases...

now my query is:: Is there any possible way to put some kind of condition on Master/slave so that my 2nd slave database will not delete any data....!!

any kind of suggestion will also be appreciated.....


regards

--rush