。
She couldn't attend the morning worship service.
Literal
She [topic-は] morning [possessive-の] worship [to-に] attend could-not.
礼拝 ('worship service') is the standard word for religious services in Japanese — used for both Christian church services and other religious observances. 出席する ('to attend') is formal, typically used for organized events (meetings, ceremonies, classes). できなかった is the potential negative past: 'was unable to.'