In this sentence she gets depressed/disappointed when she says the last sentence or just the last words? In the sentence when she says she got depressed or disappointed, it refers to how many words of the last sentence she said (or maybe the whole sentence as she had said 3 long sentences in a row).

Generally, when someone is emotionally affected by , it means not the exact the last word, but the last whole sentence or some of last sentences which convey one meaningful content.

We use the similar expression like this as

> {}{}{} **{}{}** ‌{}{}{}{}.

In this case general translation will be like;

> The bride cried a little only at **the last part of her father's speech** at the wedding ceremony.