Declension table of ?upasthātavya

Neuter	Singular	Dual	Plural
Nominative	upasthātavyam	upasthātavye	upasthātavyāni
Vocative	upasthātavya	upasthātavye	upasthātavyāni
Accusative	upasthātavyam	upasthātavye	upasthātavyāni
Instrumental	upasthātavyena	upasthātavyābhyām	upasthātavyaiḥ
Dative	upasthātavyāya	upasthātavyābhyām	upasthātavyebhyaḥ
Ablative	upasthātavyāt	upasthātavyābhyām	upasthātavyebhyaḥ
Genitive	upasthātavyasya	upasthātavyayoḥ	upasthātavyānām
Locative	upasthātavye	upasthātavyayoḥ	upasthātavyeṣu

Compound upasthātavya -

Adverb -upasthātavyam -upasthātavyāt