On the HSK 4 vocabulary list, at CEFR level B2.

ㄌㄚˋ

    • to leave out
    • to be missing
    • to leave behind or forget to bring
    • to lag or fall behind

lào ㄌㄠˋ

    • colloquial reading for 落[luo4] in certain compounds

luò ㄌㄨㄛˋ

    • to fall or drop
    • to set

      of the sun

    • to go out

      of a tide

    • to lower
    • to decline or sink
    • to lag or fall behind
    • to fall onto
    • to rest with
    • to get or receive
    • to write down
    • whereabouts
    • settlement

Where 落 is used

Sources