From your question, it appears that the name of one accused person (out of three) has been dropped while filing the charge sheet. This means that police did not file the charge sheet against that one accused person. This happens when the police did not find sufficient evidence to file charge sheet against him or if it found that no offence was committed by him at all.
This is not called quashing of the charge sheet against that accused person. You can say that he was not charge sheeted or that his name was dropped from the charge sheet.
Generally speaking, this should not come in the way of such accused person getting a government job, because he has not even been charge sheeted. However, it may depend on the nature / type of offence (e.g., whether it is a very serious offence or not) and also in what circumstances charge sheet was not filed against him (e.g., whether it was due to lack of evidence or that no offence was committed by him at all). So, sometimes, the authority offering the government job may like to look into the details.
But, as I mentioned, generally speaking, it should not come in the way of getting a government job.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.