Parents of children who died as a result of incidents involving social media and gaming have accused the British government of "watering down" internet safety regulations.
They say that Science Secretary Michelle Donelan is being "callous" in withdrawing a "personal commitment."
Donelan responded to the group by saying she took the promises she made to them "extremely seriously."
However, she said in a letter that she feels the requested adjustments are covered by current legislation.
In June, the government announced plans to give coroners additional powers to examine information on bereaved families' loved ones kept by internet companies in cases where there is a reasonable suspicion that the online world had a role in their deaths.
However, under the Data Bill, which is expected to be considered in parliament next week, this clause would be clarified so that it only relates to children who have committed suicide, rather than children who have died in other ways in which social media may have played a role.
Bereaved Families for Online Safety wrote in a letter to Donelan at the end of November that they were "gratified and moved" by the government's first promise in June, with several of them going to parliament to witness it proclaimed.
"Our children died in different ways, but the tragedy for each of us remains," the parents' group of ten stated.
"So, we were devastated by the government amendment that it has changed this measure in the Data Protection and Digital Information Bill to children who have taken their own lives."