It means burglary in the third degree. Essentially it means that she is accused of unlawfully entering a building with intent to commit a crime in the building (usually theft). It is a Class D felony that carries one to seven years in jail and/or a fine. It is a good idea for her to obtain counsel, either by hiring one or by applying for the public defender, since it is a felony charge that could carry a fair amount of jail time. If she has a good record, an attorney can try to work out a plea deal to a lesser charge and/or to get her a sentence that mostly involves probation over jail time.
Hope this helps clear things up.
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