Honor killings in Pakistan are often mistakenly described as the product of Islamic law. Some reports on Tuesday described Ms. Parveen as the victim of a stoning — an image that conjures up images of Taliban-era executions of women accused of adultery — because she had been beaten to death with bricks.

But such killings more frequently stem from tribal traditions or deep-rooted cultural norms. The independent Human Rights Commission reported that 869 women were stabbed, shot, beaten or burned to death in honor killings in Pakistan in 2013, usually at the hands of close family. The attacks have a variety of names in different languages, but are usually referred to as “black work,” a reference to the culturally unacceptable practice of marrying without familial consent.

In some cases, the killings are sanctioned by tribal councils or other community groups; men are also sometimes killed in such cases, but much less frequently.

As the country becomes more urbanized, and the middle class grows in size, marriages conducted through free choice are becoming more common. But for many young Pakistanis, the choice of a marriage partner is strongly influenced, if not entirely dictated, by parents.

Lawyers who defend women at risk of honor killing are routinely subjected to death threats, and the men who carry out the killings often escape imprisonment through an Islamic provision of Pakistani law that allows the perpetrator of a crime to avoid penalties by making a cash payment to the family of the victim. When honor killings take place inside a family, such a payment may not even be made.

Had she made it to the courthouse on Tuesday, Ms. Parveen would have told the court that she had married Mr. Iqbal of her own free will, according to her lawyer, Rao Mohammad Kharal. “Farzana was here to tell the court that she married of her own choice,” he told Agence France-Presse.

Her husband, Mr. Iqbal, accused Ms. Parveen’s father, two brothers and three other men of being behind her killing, according to a police report.

Hours later, in an interview from inside the jail cell where he was being held, Mr. Azeem told reporters that he had killed his daughter to preserve the family’s honor.