(さ)せられる -せれる (passive of emotional causative)
Usage
The emotional causative can also be used in the passive.
Examples
何度買っても宝くじが当たらず、がっかりさせられた。
I was disappointed when I never won anything in the lottery, no matter how many times I bought tickets
子供が書いた作文は素晴らしく、感心させられた
The composition the child wrote was excellent; I was impressed