三時頃に着く予定です。

N5 三時 sanji three o’clock N5 着く tsuku arrive, reach N4 予定 yotei plan, schedule, arrangement

N5 三 san, zou / mi, mi.tsu, mitsu.tsu three, trois, tres N5 時 ji / toki, -doki time, hour, temps N1 頃 kei, kyou / koro, goro, shibara.ku time, about, toward N4 着 chaku, jaku / ki.ru, ki.seru, tsu.ku, tsu.keru don, arrive, wear N3 予 yo, sha / arakaji.me beforehand, previous, myself N3 定 tei, jou / sada.meru, sada.maru, sada.ka determine, fix, establish

N5 〜予定 yotei Indicates scheduled future plan decided beforehand, equivalent to be scheduled to do N5 〜です desu Used at the end of a sentence, polite affirmative form, means to be depending on context N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context