Various aspects of the present disclosure generally relate to wireless communication. Some aspects relate to a disallowed communication direction for full-duplex time intervals. Some aspects more specifically relate to defining, for a user equipment (UE), an allowable communication direction and/or a disallowed communication direction for full-duplex time intervals (for example, for slots and/or symbols associated with full-duplex operations). In some aspects, a network node transmitting, to a UE, an indication of a communication direction that is disabled or is to be dropped (for example, not received or transmitted) during slots or symbols that are associated with full-duplex operations at the network node. The UE may transmit or receive communications, during a full-duplex time interval, that are in an allowed communication direction (for example, that are not in the disallowed communication direction).