"We've just finished Baby Loss Awareness Week and this time of year is hard enough already."
Mrs Anastasi said she cried when she saw the damage.
The vandalism was discovered by a Rotorua man visiting his father's grave yesterday and he contacted the Rotorua Daily Post.
He said he would be "rope-able" if it had been his child's grave that had been attacked.
"I was looking for other family graves when I saw it," said the man who did not want to be named. "It was horrible. I couldn't believe what they had done. It shows no respect. It's quite significant damage.
"The cemetery is a place of peace, where you go when you want time out. It's a sacred place."
He said a pot plant bought by his mum and place on his grandparents' grave had also been smashed.
Rotorua District Council parks and reserves manager Garry Page said he would ensure the damage was cleaned up.