Which literary term describes the anxiety and anticipation a reader feels about what might happen next in a story

That would be suspense

Evidence:1.

a state or feeling of excited or anxious uncertainty about what may happen.

"come on, Fran, don't keep me in suspense!"

synonyms: eagerly, agog, all agog, with bated breath, on tenterhooks, avid, excited, on edge, open-mouthed, anxious, edgy, jittery, jumpy, keyed up, overwrought, uneasy, worried; More

a quality in a work of fiction that arouses excited expectation or uncertainty about what may happen.

"a tale of mystery and suspense"

synonyms: tension, uncertainty, doubt, doubtfulness, anticipation, expectation, expectancy, excitement, anxiety, nervousness, apprehension, apprehensiveness, strain

"I can't bear the suspense a moment longer!"

2.

LAW

the temporary cessation or suspension of something.